2024 Acid Rain Monitoring (ARM) Report and Results

Welcome to the 2024 Acid Rain Monitoring (ARM) Report page. We are committed to providing detailed and clear information on the impacts of acid deposition on Massachusetts' surface waters. This year's report marks the 23rd year of Phase IV of the Acid Rain Monitoring Project, an initiative launched in 1983.

Executive Summary

Supported by the Massachusetts Department of Environmental Protection and led by the Water Resources Research Center at the University of Massachusetts Amherst, the Acid Monitoring Project—a ground-breaking initiative that began in 1983 to evaluate the effects of acid deposition on surface waters across Massachusetts—entered its 23rd year in 2024. This year, 45 volunteers from 33 towns statewide sampled 146 water bodies, with analysis conducted at the UMass Environmental Analysis Lab and 9 additional volunteer-staffed labs located from Westfield to the Cape Cod National Seashore, including labs such as the MWRA Quabbin Lab in Belchertown and the Springfield Water and Sewer Commission lab in Westfield. Long-term sites, with data dating back to at least 1985, underwent detailed analysis for color and 11 ions (Cl, NO3, SO4, Mg, Mn, Fe, Cu, Al, Ca, Na, K). Of the 26 long-term sites, 25 were accessible for analysis, with one site remaining inaccessible for the year.

Key Findings

pH and Alkalinity Trends

• 29% of surveyed water bodies exhibited a notable increase in pH.
• 29% showed a significant rise in alkalinity.
• 7% of water bodies exhibited a decrease in pH.
• 10% displayed a significant downward trend in alkalinity.

Ion and Color Analysis for Long-Term Sites

• Sodium (Na) and Potassium (K): Significant increases observed, likely influenced by road salting practices.
• Chloride (Cl): Increased at 17 sites, associated with road salting and industrial discharges.
• Color: Increased at 20 sites, potentially indicating a recovery of natural alkalinity or changes in organic matter concentrations.
• Sulfate (SO4): Decreased at 25 sites, reflecting the positive impact of reduced industrial emissions.

Correlation Analysis from Heatmaps

Our detailed correlation analysis, visualized through heatmaps, provides deeper insights into the relationships between various water quality parameters across long-term monitoring sites from 1983 to 2024. Key observations include:

Strong Positive Correlations

• Calcium (Ca) and Magnesium (Mg): Across most sites, there is a strong positive correlation between calcium and magnesium, suggesting that these elements often occur together in higher concentrations due to similar sources such as geological formations and agricultural runoff.
• Sodium (Na) and Chloride (Cl): A common strong positive correlation exists between sodium and chloride, typically attributed to road salt application and industrial discharges.

Strong Negative Correlations

• Color and Sulfate (SO4): Many sites exhibit a strong negative correlation between color and sulfate, indicating that higher levels of dissolved organic matter are associated with lower sulfate concentrations.
• Nitrate (NO3_N) and Iron (Fe): Some sites show a negative correlation between nitrate and iron, suggesting that higher nitrate levels might be associated with lower iron concentrations due to redox conditions in the water.

Neutral or Weak Correlations

• Aluminum (Al): Often shows weak correlations with other elements, reflecting its independent behavior in the water.
• pH and Sulfate (SO4): A weak negative correlation was observed, indicating that higher sulfate concentrations tend to be associated with lower pH levels.

Methods

Sampling Design and Procedures

• Sampling occurred on April 7, 2024, with challenging weather conditions.
• Volunteers collected surface water samples from 146 sites across Massachusetts, ensuring accurate representation.
• Detailed protocols were followed for sample collection and laboratory analysis to maintain data integrity.

Laboratory Analysis

• Analysis conducted at the UMass Environmental Analysis Lab and 9 additional volunteer-staffed labs.
• Long-term sites underwent detailed analysis for color and 11 ions, providing a comprehensive view of water quality trends. The UMass Extension Soils Laboratory analyzed long-term site samples for cations, while the University of New Hampshire’s Water Quality Analysis Laboratory analyzed samples for anions.

Volunteer Network

The Acid Rain Monitoring Project relies on the dedication of volunteers. This year, 45 volunteers from 33 towns participated in the sampling efforts, contributing to the success of the project. Their involvement is crucial for maintaining a broad and detailed understanding of water quality across the state.

Full Report Access

For a detailed analysis and comprehensive data, the full 2024 Acid Rain Monitoring Project Annual Report is available. Access the full report here.

Conclusion

The 2024 report highlights the importance of continuous monitoring and adaptive management strategies to address the ongoing impacts of acid deposition. The data collected provides valuable insights into water quality trends and informs future environmental policies and practices.

Thank you for your continued support and interest in our environmental monitoring efforts. For more information, please contact the Water Resources Research Center at the University of Massachusetts Amherst.

2024 Report and Results Page

These are the results for sites sampled April 2, 2023.

For comprehensive results going back to 1983, please go to our searchable database.

The water bodies are listed alphabetically by water body name.

Alkalinity is reported in mg/L as CaCO3.

2023 ARM Results

Name	Town	Palsaris	pH	ANC
Aldrich Brook	Millville	5131425	6.15	3.2
Angeline Brook	Westport	9560000	5.01	-0.4
Anthony Brook	Dalton	2105425	6.42	2.4
Ashby Reservoir	Ashby	81001	6.15	2.2
Ashfield Lake	Ashfield	33001	7.17	32.7
Babcock Brook	Tolland	3107625	5.69	4.0
Bagg Brook	West Springfield	3417750	7.65	74.0
Baker Brook	Gardner	3524050	5.31	1.6
Bartlett Pond Brook	Leominster	8146000	5.30	0.4
Barton Brook	Dalton	2105350	6.89	10.0
Bassett Brook	Raynham	6236100	6.31	8.4
Bassett Pond	New Salem	35002	5.88	0.9
Beagle Club Pond	Dartmouth	371	6.92	10.1
Beaman Brook	Winchendon	3523825	5.72	2.0
Belmont Reservoir	Hinsdale	21010	5.44	0.7
Benton Brook	Otis	3107375	6.30	9.2
Bickford Pond	Hubbardston	36015	6.39	3.3
Bilodeau Brook	Hinsdale	2105750	6.93	10.9
Black Brook	Hamilton	9253700	6.48	16.9
Black Brook	Warwick	3522675	6.36	1.9
Blossom Brook	Fall River	6134700	4.66	-1.4
Blue Hills Reservoir	Qunicy	73004	7.55	13.9
Bog Pond	Savoy	33003	6.13	3.8
Boston Brook	Middleton	9253925	6.86	17.5
Bozrah Brook	Hawley	3315325	7.07	8.1
Brass Mill Pond	Williamsburg	34011	6.70	12.0
Bread And Cheese Brook	Westport	9560150	6.16	3.1
Buck Pond	Westfield	32012	6.85	17.0
Bungay River	North Attleborough	5233750	6.70	22.3
Cadwell Creek	Pelham	3626575	5.92	0.7
Cady Brook	Washingon	2105725	6.65	8.40
Cheshire Reservoir North	Cheshire	11002	8.18	94.7
Clear Run Brook	Seekonk	5334150	6.87	37.5
Cloverdale Street Pond	Rutland	36036	6.50	8.3
Cobble Mountain Reservoir	Blandford	32018	6.74	7.0
Coes Reservoir	Worcester	51024	7.02	19.3
College Pond	Plymouth	95030	6.48	2.5
Cowee Pond	Garner	35013	5.23	0.2
Cronin Brook	Grafton	5132625	6.73	7.1
Crystal Lake	Palmer	36043	5.99	1.0
Dorothy Brook	Worcester	5132700	6.74	20.2
Duck Pond	Groton	84083	6.67	6.7
East Branch Swift River	Barre	3627200	6.37	2.2
East Brimfield Reservoir	Brimfield	41014	6.26	5.2
East Oxbow Brook	Charlemont	3314925	6.52	2.9
Ezekiel Pond	Plymouth	95051	6.71	3.9
Farm Pond	Sherborn	72039	6.91	4.5
Fiske Pond	Wendell	34023	5.43	0.3
Flat Brook	Ware	3627500	6.85	7.9
Fox Brook	Granville	3106825	6.29	3.0
French River	Oxford	4230075	6.79	12.6
Godfrey Brook	Milford	7240375	7.45	26.2
Great Pond	Wellfleet	96117	6.23	1.0
Greenwood Pond	Templeton	35026	5.37	1.2
Grove Pond	Ayer	81053	7.02	17.2
Gulf Brook	Pepperell	8143675	7.00	11.2
Hartwell Brook	Charlemont	3315075	7.30	13.1
Hatches Creek	Eastham	9661525	6.33	8.2
Hawley Reservoir	Pelham	34031	6.17	1.5
Heald Pond	Pepperell	81056	7.10	15.6
Hedges Pond	Plymouth	94065	6.44	2.4
Hinsdale Brook	Shelburne	3313175	7.86	37.1
Holden Reservoir	Holden	51063	6.70	5.6
Hop Brook	New Salem	3627000	6.74	4.2
Indian Pond	Kingston	94072	6.48	11.2
Ipswich River	Ipswich	9253500	6.95	25.4
Johnson Pond	Raynham	62097	6.12	5.0
Kenny Brook	Royalston	3523750	6.01	1.4
Kickamuit River	Swansea	6134500	6.38	9.0
Kilburn Brook	Peru	2105700	6.64	4.1
King Phillip Brook	Fall River	6134725	4.65	-0.5
Kinnacum Pond	Wellfleet	96163	5.39	0.3
Kinsman Brook	Heath	3314450	6.90	6.5
Lake Rohunta; South Basin	Athol	35107	6.39	2.7
Lake Denison	Winchendon	35017	5.90	2.4
Lake Garfield	Monterey	21040	7.88	50.0
Lake Lorraine	Springfield	36084	6.55	10.0
Lake Pearl	Wrentham	72092	6.97	24.0
Lake Wampanoag	Ashburhnham	81151	5.09	0.4
Lake Watatic	Ashburnham	35095	6.12	3.4
Lake Wyola	Shutesbury	34103	6.39	1.8
Little River	Westfield	3208725	6.85	8.0
Little Sandy Pond	Plymouth	95092	6.74	5.2
Long Pond	Great Barrington	21062	8.02	79.0
Lord Brook	Rowe	3316550	6.35	1.6
Lynde Brook Reservoir	Leicester	51090	7.16	17.0
Maynard Brook	Oakham	3626475	5.63	1.1
Mcgovern Brook	Lancaster	8144725	7.31	15.3
Mill River	Conway	3419825	7.36	28.7
Millham Brook	Marlborough	8247475	7.26	24.3
Moores Pond	Warwick	35048	6.20	2.1
New Long Pond	Plymouth	95112	6.19	0.6
Nipmuck Pond	Webster	42039	5.74	1.6
Noquockoke Lake	Dartmouth	95170	6.24	3.8
North River	Colrain	3314100	7.05	9.9
North Watuppa Lake	Fall River	61004	6.16	1.6
Phoenix Pond; Double Pd	Shirley	81100	7.17	17.4
Plain Street Pond	Mansfield	52032	6.58	12.4
Plainfield Pond	Plainfield	33017	5.85	0.3
Pleasant Street Pond	Franklin	72095	7.06	20.9
Quabbin Res.Station 202	Belchertown	36129	6.74	3.8
Rattlesnake Brook	Freetown	6235125	5.36	0.5
Robbins Brook	Winchendon	3524250	5.75	1.3
Robbins Pond	Harvard	81111	7.77	55.4
Robinson Brook	Pepperell	8143825	7.38	21.7
Rocky Run	Rehoboth	5334100	6.60	10.8
Round Meadow Brook	Mendon	5131275	6.17	5.2
Round Pond	Brewster	96264	5.61	0.3
Sandy Pond	Ayer	81117	6.82	8.0
Scarborough Pond	Belchertown	34080	6.18	2.6
Sewall Brook	Boylston	5132600	6.94	16.6
Shingle Brook	Shelburne	3313850	7.72	50.5
Shingle Island Brook	Freetown	188	5.55	1.7
Sleepy Hollow Brook	Richmond	2104200	7.84	99.6
Soda Creek	Sheffield	2103725	7.24	31.0
Spectacle Pond	Warehem	95142	6.74	5.8
Stony Brook Pond	Norfolk	72113	6.99	23.7
Storrow Pond	Westwood	72115	6.42	4.3
Stump Pond	Gardner	35085	5.42	1.5
Sucker Brook	New Braintree	3625975	6.39	5.7
Thompsons Pond	Spencer	36155	6.67	6.5
Todd Brook	Charlemont	3316050	5.53	-0.2
Torrey Creek	Seekonk	5334075	6.35	17.1
Towne Brook	Royalston	3524200	5.41	0.8
Trout Pond	Tolland	31042	5.50	3.0
Tully Pond	Orange	35089	6.46	2.5
Turner Pond	New Bedford	95151	5.14	0.7
Underwood Brook	Heath	3314650	6.68	3.2
Upper Attitash Pond	Kingston	84072	7.35	17.2
Upper Mystic Lake	Winchester	71043	7.57	39.2
Upper Naukeag Lake	Ashburhnam	35090	6.00	1.8
Upper Spectacle Pond	Sandisfield	31044	6.21	6.0
Valley Brook	Granville	3107700	6.19	4.0
Vincent Brook	Colrain	3314550	7.11	9.0
Walker Brook	Becket	3210300	6.79	9.6
Wallis Reservoir	Douglas	51179	5.89	1.6
Wellington Brook	Oxford	4230325	6.90	17.8
West Br Ware River	Hubbardston	3628175	6.32	2.3
West Branch Swift River	Shutesbury	3626800	5.77	0.8
Whitehall Reservoir	Hopkinton	82120	6.50	5.5
Wilder Brook	Gardner	3523950	5.02	0.2
Williams River	West Stockbridge	2104100	7.89	118.8
Winnecunnet Pond	Norton	62213	6.81	10.8
Wright Pond	Ashby	81160	6.25	3.3

These are the results for sites sampled April 10, 2022.

For comprehensive results going back to 1983, please go to our searchable database.

The water bodies are listed alphabetically by water body name for each town, towns listed alphabetically.

Alkalinity is reported in mg/L as CaCO3.
Figures in red failed laboratory analysis quality control.

pH and Alkalinity Results for April 10, 2022 Collection

Town	Name	Palsite	pH	ANC
Amesbury	Upper Attitash Pond	84072	7.36	18.7
Ashburnham	Upper Naukeag Lake	35090	6.28	1.6
Ashburnham	Lake Watatic	35095	6.57	3.8
Ashburnham	Lake Wampanoag	81151	5.84	1
Ashby	Ashby Reservoir	81001	6.37	3.2
Ashby	Wright Pond	81160	6.6	3.4
Ashfield	Ashfield Lake	33001	7.66	43.3
Becket	Walker Brook	3210300	7.13	16
Belchertown	Scarboro Pond	34080	6.35	2.5
Belchertown	Quabbin Reservoir Station 202	36129	6.41	3.65
Blandford	Cobble Mountain Reservoir	32018	6.74	10
Boylston	Sewall Brook	5132600	6.99	18.2
Brewster	Round Pond	96264	5.273	0
Brewster	Round Pond	96264	5.273	0
Brimfield	East Brimfield Reservoir	41014	6.6	10
Charlemont	East Oxbow Brook	3314925	6.68	3.7
Charlemont	Hartwell Brook	3315075	7.4	19.7
Charlemont	Todd Brook	3316050	6.68	2.8
Cheshire	Cheshire Reservoir North	11002	8.2	80.2
Colrain	North River	3314100	7.11	15.5
Colrain	Vincent Brook	3314550	7.31	12.6
Conway	Mill River	3419825	7.36	65.6
Dalton	Barton Brook	2105350	7.41	24
Dalton	Anthony Brook	2105425	6.88	10
Dartmouth	Johnson Pond	62097	6.21	3.8
Dartmouth	Torrey Creek	5334075	6.3	18.4
Douglas	Whitin Reservoir	51179	5.66	0.7
Eastham	Hatches Creek	9661525	7.547	8.9
Easton	Beagle Club Pond	371	6.83	10.8
Easton	Bread And Cheese Brook	9560150	6.06	3.1
Fall River	Noquockoke Lake South Basin	95170	6.06	3.6
Fall River	Blossom Brook	6134700	4.62	-1.2
Franklin	Pleasant Street Pond	72095
Freetown	King Phillip Brook	6134725	4.64	-1.3
Freetown	Beaver Brook	6235800	6.64	15.6
Gardner	Cowee Pond	35013	5.58	0.2
Gardner	Stump Pond	35085	5.71	1.6
Gardner	Wilder Brook	3523950	5.14	-0.9
Gardner	Baker Brook	3524050	5.78	1.6
Grafton	Cronin Brook	5132625	6.46	9.1
Granville	Fox Brook	3106825	6.44	2.8
Granville	Valley Brook	3107700	6.64	6.4
Great Barrington	Long Pond	21062	7.62	88
Hamilton	Black Brook	9253700	6.75	22.8
Hawley	Bozrah Brook	3315325	7.26	13.3
Heath	Kinsman Brook	3314450	6.98	11.7
Heath	Underwood Brook	3314650	6.89	5.7
Hinsdale	Belmont Reservoir	21010	5.33	0.3
Hinsdale	Cady Brook	2105725	7.05	18
Hinsdale	Bilodeau Brook	2105750	7.33	26
Holden	Holden Reservoir 1	51063	6.58	6.2
Hopkinton	Whitehall Reservoir	82120	6.25	5.6
Hubbardston	Bickford Pond	36015	6.75	2.9
Hubbardston	West Branch Ware River	3628175	6.2	2.73
Ipswich	Ipswich River	9253500	7.06	31.1
Kingston	Indian Pond	94072	6.33	10
Leominster	Bartlett Pond Brook	8146000	5.72	1.1
Mansfield	Kickamuit River	6134500	6.59	11.4
Marlborough	Millham Brook	8247475	6.96	27.6
Medfield	Notch Pond	72088	5.16	0.4
Mendon	Round Meadow Brook	5131275	6.33	5.6
Methuen	Mystic Pond	84043	6.85	23
Middleton	Boston Brook	9253925	6.98	22.9
Milford	Godfrey Brook	7240375	7.01	26.6
Millville	Aldrich Brook	5131425	6.25	5.1
Monterey	Lake Garfield	21040	7.74	51
New Bedford	Bungay River	5233750	6.72	19.6
New Braintree	Sucker Brook	3625975	6.62	5.3
New Salem	Bassett Pond	35002	6	1.1
New Salem	Hop Brook	3627000	6.76	4.8
North Attleborough	Shingle Island Brook	188	5.34	1
Norton	Plain Street Pond	52032	6.77	14.3
Oakham	Maynard Brook	3626475	5.89	1.7
Orange	Tully Pond	35089	6.49	2.5
Otis	Benton Brook	3107375	6.48	9
Oxford	French River	4230075	6.65	10.1
Oxford	Wellington Brook	4230325	6.54	23.8
Palmer	Crystal Lake	36043	5.62	0.24
Pelham	Hawley Reservoir	34031	6.02	1.79
Pelham	Cadwell Creek	3626575	5.79	0.77
Pepperell	Heald Pond	81056	7.34	17.5
Pepperell	Gulf Brook	8143675	7.4	15
Pepperell	Robinson Brook	8143825	7.56	27.2
Peru	Kilburn Brook	2105700	6.94	8
Petersham	East Branch Swift River	3627200	6.25	3.08
Plainfield	Plainfield Pond	33017	6.83	7
Plymouth	Hedges Pond	94065	6.31	1.4
Plymouth	College Pond	95030	6.47	2
Plymouth	Ezekiel Pond	95051	6.75	3.3
Plymouth	Little Sandy Pond	95092	6.58	3
Plymouth	New Long Pond	95112	6.34	1.2
Quincy	Blue Hills Reservoir	73004	7.43	15.2
Raynham	Rocky Run	5334100	6.55	10.2
Raynham	Angeline Brook	9560000	4.97	-0.2
Rehoboth	North Watuppa Lake	61004	5.28	0.4
Richmond	Sleepy Hollow Brook	2104200	7.88	131
Rowe	Lord Brook	3316550	6.69	2.4
Royalston	Kenny Brook	3523750	6.39	2.2
Royalston	Towne Brook	3524200	5.56	0.5
Rutland	Cloverdale Street Pond	36036	6.87	6.5
Sandisfield	Upper Spectacle Pond	31044	6.75	11
Savoy	Bog Pond	33003	6.24	4
Seekonk	Turner Pond	95151	4.64	-1.4
Seekonk	Mulberry Meadow	6235775	6.72	10.8
Sheffield	Soda Creek	2103725	7.1	28
Shelburne	Hinsdale Brook	3313175	7.83	48.4
Shelburne	Shingle Brook	3313850	7.63	51
Sherborn	Farm Pond	72039	6.8	3.5
Shutesbury	Lake Wyola	34103	6.62	1.1
Shutesbury	West Branch Swift River	3626800	5.82	0.3
Springfield	Lake Lorraine	36084	6.28	11
Swansea	Bassett Brook	6236100	6.3	3.5
Taunton	Winnecunnet Pond	62213	6.86	9.6
Templeton	Greenwood Pond	35026	5.69	0.6
Tolland	Trout Pond 2	31042	5.6	0.7
Tolland	Babcock Brook	3107625	5.79	1.5
Ware	Flat Brook	3627500	6.4	7.56
Wareham	Spectacle Pond	95142	6.89	5.4
Warwick	Moores Pond	35048	6.49	2.5
Warwick	Black Brook	3522675	6.31	2
Webster	Nipmuck Pond	42039	5.71	0.8
Wellfleet	Great Pond	96117	6.071	0.7
Wellfleet	Kinnacum Pond	96163	6.92	0
Wendell	Fiske Pond	34023	5.47	0.4
West Springfield	Bagg Brook	3417750	7.54	61
West Stockbridge	Williams River	2104100	7.84	114
Westfield	Buck Bond	32012	6.82	22
Westfield	Little River	3208725	7.08	30
Westport	Clear Run Brook	5334150	6.83	41.5
Westport	Rattlesnake Brook	6235125	5.21	0.3
Westwood	Storrow Pond	72115	6.3	5.6
Williamsburg	Brass Mill Pond	34011	7.11	10.7
Winchendon	Lake Denison	35017	6.09	6.4
Winchendon	Beaman Brook	3523825	6.12	2.1
Winchendon	Robbins Brook	3524250	6.07	1.3
Winchester	Upper Mystic Lake	71043	7.92	44.4
Worcester	Dorothy Brook	5132700	7.12	26

 

These are the results for sites sampled April 11, 2021.

For comprehensive results going back to 1983, please go to our searchable database.

The water bodies are listed alphabetically by water body name.

Alkalinity is reported in mg/L as CaCO3.

pH and Alkalinity Results for April 11, 2021 Collection

Name	Palsite	Town	pH	Alkalinity
Aldrich Brook	5131425	Millville	5.77	1
Angeline Brook	9560000	Westport	5	-0.3
Anthony Brook	2105425	Dalton	6.82	5.6
Ashby Reservoir	81001	Ashby	6.66	3.9
Ashfield Lake	33001	Ashfield	7.5	39.2
Babcock Brook	3107625	Tolland	5.9	1.4
Bagg Brook	3417750	West Springfield	7.93	103
Baker Brook	3524050	Gardner	5.96	2.5
Bartlett Pond Brook	8146000	Leominster	5.51	0.5
Barton Brook	2105350	Dalton	7.58	31.4
Bassett Brook	6236100	Raynham	6.36	7.3
Bassett Pond	35002	New Salem	5.76	0.9
Beagle Club Pond	371	Dartmouth	7	10.8
Beaman Brook	3523825	Winchendon	6.33	3.1
Beaver Brook	6235800	Easton	6.88	17.3
Belmont Reservoir	21010	Hindsdale	5.49	0.5
Benton Brook	3107375	Otis	6.34	7.5
Bickford Pond	36015	Hubbardston	6.59	2.3
Bilodeau Brook	2105750	Hindsdale	7.49	29.4
Black Brook	3522675	Warwick	6.65	27.1
Black Brook	9253700	Hamilton	6.4	2.3
Blossom Brook	6134700	Fall River	4.4	-2.4
Blue Hills Reservoir	73004	Quincy	7.2	14.5
Boston Brook	9253925	Middleton	6.96	29.9
Bozrah Brook	3315325	Hawley	7.22	20.5
Brass Mill Pond	34011	Williamsburg	7.4	14.2
Bread And Cheese Brook	9560150	Westport	6.1	2.8
Buck Pond	32012	Westfield	7.37	21
Bungay River	5233750	North Attleborough	6.83	19.4
Cadwell Creek	3626575	Pelham	6.33	1.6
Cady Brook	2105725	Hindsdale	6.97	20.9
Cheshire Reservoir North	11002	Cheshire	8.23	92.5
Clear Run Brook	5334150	Seekonk	6.84	38.3
Cloverdale Street Pond	36036	Rutland	6.72	6.9
Cobble Mountain Reservoir	32018	Blandford	7.27	10
Coes Reservoir	51024	Worcester	6.3	16
College Pond	95030	Plymouth	6.41	2.5
Cowee Pond	35013	Gardner	5.68	0.9
Cronin Brook	5132625	Grafton	6.4	14
Crystal Lake	36043	Palmer	6.02	0.94
Dorothy Brook	5132700	Worcester	6.27	37
Duck Pond	84083	Groton	6.71	5
East Branch Swift River	3627200	Petersham	5.96	2.3
East Brimfield Reservoir	41014	Brimfield	7.04	11
East Oxbow Brook	3314925	Charlemont	6.94	7.2
Ezekiel Pond	95051	Plymouth	6.78	2.8
Fiske Pond	34023	Wendell	5.53	1.1
Flat Brook	3627500	Ware	6.64	8.93
Fox Brook	3106825	Granville	6.51	4
French River	4230075	Oxford	5.95	16
Godfrey Brook	7240375	Milford	6.32	36
Great Pond	96117	Wellfleet	5.97	0.5
Greenwood Pond	35026	Templeton	5.68	1
Grove Pond	81053	Ayer	7.08	22.8
Gulf Brook	8143675	Pepperell	7.39	13
Hartwell Brook	3315075	Charlemont	7.47	27.8
Hatches Creek	9661525	Eastham	6.47	7.5
Hawley Reservoir	34031	Pelham	6.29	2.2
Heald Pond	81056	Pepperell	7.31	14.6
Hedges Pond	94065	Plymouth	6.37	1.3
Hinsdale Brook	3313175	Shelburne	7.9	61.4
Holden Reservoir 1	51063	Holden	6	2
Hop Brook	3627000	New Salem	6.81	6.6
Indian Pond	94072	Kingston	6.22	21.2
Ipswich River	9253500	Ipswitch	6.94	30.5
Johnson Pond	62097	Raynham	6.16	3.7
Kenny Brook	3523750	Royalston	6.43	2.4
Kickamuit River	6134500	Swansea	6.55	11
Kilburn Brook	2105700	Peru	7.07	12.4
King Phillip Brook	6134725	Fall River	4.56	-1.7
Kinnacum Pond	96163	Wellfleet	5.22	-0.1
Kinsman Brook	3314450	Heath	7.16	17.9
Lake Rohunta South Reservoir	35107	Athol	6.38	3.8
Lake Wampanoag	81151	Ashburnham	6.05	1.5
Lake Denison	35017	Winchendon	6.09	3.1
Lake Garfield	21040	Monterey	7.64	51
Lake Lorraine	36084	Springfield	6.71	15
Lake Watatic	35095	Ashburnham	6.72	4.3
Lake Wyola	34103	Shutesbury	6.41	2.2
Little River	3208725	Westfield	7.34	15
Little Sandy Pond	95092	Plymouth	6.46	1.7
Long Pond	21062	Great Barrington	7.86	81.7
Lord Brook	3316550	Rowe	6.91	5.4
Lynde Brook Reservoir	51090	Leicester	6.28	13
Maynard Brook	3626475	Oakham	5.87	2
Mcgovern Brook	8144725	Lancaster	7.36	17.6
Mill River	3419825	Conway	7.64	38.7
Millham Brook	8247475	Marlborough	6.36	36
Moores Pond	35048	Warwick	6.57	3.3
Mulberry Meadow	6235775	Easton	6.81	9.8
Mystic Pond	84043	Methuen	7.14	25.8
North Watuppa Lake	61004	Fall River	5.36	0.6
New Long Pond	95112	Plymouth	6.29	1.8
Nipmuck Pond	42039	Webster	5.51	3
Noquockoke Lake	95170	Dartmouth	6.18	3.8
North River	3314100	Colrain	7.54	23.6
Notch Pond	72088	Medfield	4.99	1
Phoenix Pond	81100	Shirley	7.24	22.6
Plain Street Pond	52032	Mansfield	6.5	11.2
Plainfield Pond	33017	Plainfield	6.46	3.6
Quabbin Reservoir Station 202	36129	Belchertown	6.63	4.47
Rattlesnake Brook	6235125	Freetown	5.36	0.2
Robbins Brook	3524250	Winchendon	6.03	1.3
Robbins Pond	81111	Harvard	8.52	46.9
Robinson Brook	8143825	Pepperell	7.67	27.8
Rocky Run	5334100	Rehoboth	6.51	9.2
Round Meadow Brook	5131275	Mendon	5.92	1
Round Pond	96264	Brewster	5.31	0.7
Sandy Pond	81117	Ayer	7.3	9.6
Scarboro Pond	34080	Belchertown	6.44	4.2
Sewall Brook	5132600	Boylston	6.26	18
Shingle Brook	3313850	Shelburne	7.5	60.6
Shingle Island Brook	188	Freetown	5.91	2.3
Sleepy Hollow Brook	2104200	Richmond	8.09	190.7
Spectacle Pond	95142	Wareham	6.8	5
Storrow Pond	72115	Westwood	6.25	4.1
Stump Pond	35085	Gardner	5.85	2.2
Sucker Brook	3625975	New Braintree	6.59	6.4
Thompsons Pond	36155	Spencer	6.29	8
Todd Brook	3316050	Charlemont	6.35	1.9
Torrey Creek	5334075	Seekonk	6.26	15.5
Towne Brook	3524200	Royalston	5.93	1.7
Trout Pond 2	31042	Tolland	6.13	2.3
Tully Pond	35089	Orange	6.21	3.5
Turner Pond	95151	New Bedford	4.59	-1.8
Underwood Brook	3314650	Heath	7.03	4.4
Upper Attitash Pond	84072	Amesbury	7.42	20.3
Upper Mystic Lake	71043	Winchester	7.78	40.8
Upper Naukeag Lake	35090	Ashburnham	6.24	1.6
Upper Spectacle Pond	31044	Sandisfield	6.74	8.6
Valley Brook	3107700	Granville	6.19	3.1
Vincent Brook	3314550	Colrain	7.4	17.7
Walker Brook	3210300	Becket	7.17	16.8
Wallis/Whitins Reservoir	51179	Douglas	5.47	0
Wellington Brook	4230325	Oxford	6.25	24
West Branch Swift River	3626800	Shutesbury	6.08	1.5
West Branch Ware River	3628175	Hubbardston	6.49	3.14
Whitehall Reservoir	82120	Hopkinton	6.3	10
Wilder Brook	3523950	Gardner	5.05	-0.2
Williams River	2104100	West Stockbridge	8	134.3
Winnecunnet Pond	62213	Norton	6.83	10.6
Wright Pond	81160	Ashby	6.45	2.9

These are preliminary results for sites sampled April 7, 2019. Some values may change or may be added or deleted as the data quality assessment continues. If these data are distributed to others, please be sure to indicate their preliminary nature. For comprehensive results going back to 1983, please go to our searchable database.

The water bodies are listed alphabetically by water body name.

Alkalinity is reported in mg/L as CaCO₃.

Results in red did not pass quality control.

pH and Alkalinity Results for April 7, 2019 Collection

Name	Palsite	Town	pH	Alkalinity
Aldrich Brook	5131425	Millville	6.26	5.8
Angeline Brook	9560000	Westport	5.51	1.6
Anthony Brook	2105425	Dalton	6.49	5.7
Ashby Reservoir	81001	Ashby	6.45	2.5
Ashfield Lake	33001	Ashfield	7.23	40.1
Babcock Brook	3107625	Tolland	6.03	1.9
Bagg Brook	3417750	West Springfield	8.09	96
Baker Brook	3524050	Gardner	5.71	2
Bartlett Pond Brook	8146000	Leominster	5.59	0.6
Barton Brook	2105350	Dalton	7.42	19.6
Bassett Brook	6236100	Raynham	6.25	5.7
Bassett Pond	35002	New Salem	5.67	1.7
Beagle Club Pond	371	Dartmouth	6.32	6.8
Beaman Brook	3523825	Winchendon	6	1.7
Beaver Brook	6235800	Easton	6.55	13.5
Belmont Reservoir	21010	Hindsdale	5.34	0.6
Benton Brook	3107375	Otis	5.93	3.6
Bickford Pond	36015	Hubbardston	6.37	2.7
Bilodeau Brook	2105750	Hindsdale	7.01	21.3
Black Brook	3522675	Warwick	6.24	2.2
Black Brook	9253700	Hamilton	6.61	17.7
Blossom Brook	6134700	Fall River	4.54	-2.4
Blue Hills Reservoir	73004	Quincy	7.14	16.5
Bog Pond	33003	Savoy	5.96	2.6
Boston Brook	9253925	Middleton	6.88	19.5
Bozrah Brook	3315325	Hawley	7.3	16.1
Brass Mill Pond	34011	Williamsburg	7.31	10.6
Bread And Cheese Brook	9560150	Westport	6.18	3.7
Buck Pond	32012	Westfield	7	22
Bungay River	5233750	North Attleborough	6.62	19.4
Cadwell Creek	3626575	Pelham	6.01	0.86
Cady Brook	2105725	Hindsdale	6.7	12.9
Cheshire Res. North	11002	Cheshire	7.72	55.8
Clear Run Brook	5334150	Seekonk	6.79	39.1
Cloverdale Street Pond	36036	Rutland	6.78	7.7
Cobble Mtn. Reservoir	32018	Blandford	6.8	7
Coes Reservoir	51024	Worcester	6.99	16.5
College Pond	95030	Plymouth	6.38	2.8
Cowee Pond	35013	Gardner	5.4	0.7
Cronin Brook	5132625	Grafton	6.55	10.7
Crystal Lake	36043	Palmer	5.93	0.8
Deep Pond	62058	Taunton	6.17	7.7
Dorothy Brook	5132700	Worcester	6.6	22.9
Duck Pond	84083	Groton	6.54	7.4
East Br Swift River	3627200	Petersham	6.45	2.74
East Brimfield Res	41014	Brimfield	6.74	10
East Oxbow Brook	3314925	Charlemont	6.85	6
Ezekiel Pond	95051	Plymouth	6.56	4.6
Farm Pond	72039	Sherborn	6.63	3.2
Fiske Pond	34023	Wendell	5.15	0.5
Flat Brook	3627500	Ware	6.66	7.14
Fox Brook	3106825	Granville	4.9	-1.3
French River	4230075	Oxford	6.65	13
Godfrey Brook	7240375	Milford	7.03	24.9
Great Pond	96117	Wellfleet	5.99	0.6
Greenwood Pond	35026	Templeton	3.97	-5.4
Grove Pond	81053	Ayer	6.85	16
Gulf Brook	8143675	Pepperell	7.03	11.5
Hartwell Brook	3315075	Charlemont	7.54	22.6
Hatches Creek	9661525	Eastham	6.12	6.8
Hawley Reservoir	34031	Pelham	5.94	1.28
Heald Pond	81056	Pepperell	6.93	12.2
Hedges Pond	94065	Plymouth	6	1.2
Hinsdale Brook	3313175	Shelburne	8.05	50.6
Holden Reservoir (Upper)	51063	Holden	6.26	4
Hop Brook	3627000	New Salem	6.63	4.9
Indian Pond	94072	Kingston	6.24	9.5
Ipswich River	9253500	Ipswitch	6.93	22.5
Johnson Pond	62097	Raynham	6.38	4.6
Kenny Brook	3523750	Royalston	6.27	1.4
Kickamuit River	6134500	Swansea	6.45	10
Kilburn Brook	2105700	Peru	6.34	6.2
King Phillip Brook	6134725	Fall River	4.62	-1.7
Kinnacum Pond	96163	Wellfleet	5.36	0
Kinsman Brook	3314450	Heath	7.07	11.1
Lake Rohunta; South Basin	35107	Athol	6.12	2.5
Lake Wampanoag	81151	Ashburnham	5.69	0.7
Lake Denison	35017	Winchendon	6.04	3.1
Lake Garfield	21040	Monterey	7.76	47
Lake Lorraine	36084	Springfield	7.1	10
Lake Pearl	72092	Wrentham	6.93	15.9
Lake Watatic	35095	Ashburnham	6.2	2.6
Lake Wyola	34103	Shutesbury	6.01	1.8
Little River	3208725	Westfield	7.13	11
Little Sandy Pond	95092	Plymouth	6.47	2.1
Long Pond	21062	Great Barrington	7.99	83
Lord Brook	3316550	Rowe	6.78	4.1
Lynde Brook Reservoir	51090	Leicester	6.93	17.7
Maynard Brook	3626475	Oakham	5.63	0.9
McGovern Brook	8144725	Lancaster	7.06	12
Mill River	3419825	Conway	7.6	33.9
Millham Brook	8247475	Marlborough	6.94	26.4
Moores Pond	35048	Warwick	5.86	2.1
Mulberry Meadow	6235775	Easton	6.71	9.5
Mystic Pond	84043	Methuen	7.03	27.5
N. Watuppa Lake	61004	Fall River	5.88	2.5
New Long Pond	95112	Plymouth	5.88	2.3
Nipmuck Pond	42039	Webster	5.61	0.5
Noquockoke Lake (South Basin)	95170	Dartmouth	6.23	4
North River	3314100	Colrain	7.1	17.3
Notch Pond	72088	Medfield	5.07	0.4
Phoenix Pond	81100	Shirley	6.98	18.7
Plain Street Pond	52032	Mansfield	6.47	11.4
Plainfield Pond	33017	Plainfield	6.46	4.7
Pleasant St. Pond	72095	Franklin	6.74	22
Quabbin Res.Station 202	36129	Belchertown	6.62	3.7
Rattlesnake Brook	6235125	Freetown	5.5	0.3
Robbins Brook	3524250	Winchendon	5.75	0.6
Robbins Pond	81111	Harvard	5.85	0.9
Robinson Brook	8143825	Pepperell	7.21	24.4
Rocky Run	5334100	Rehoboth	6.4	9.5
Round Meadow Brook	5131275	Mendon	6.26	4.5
Round Pond	96264	Brewster	5.9	0.8
Sandy Pond	81117	Ayer	6.81	7.5
Scarboro Pond	34080	Belchertown	6.08	2.1
Sewall Brook	5132600	Boylston	6.95	16.9
Shingle Brook	3313850	Shelburne	7.66	54
Shingle Island Brook	188	Freetown	5.81	2.2
Sleepy Hollow Brook	2104200	Richmond	7.86	156.6
Soda Creek	2103725	Sheffield	7.24	35
Spectacle Pond	95142	Wareham	6.59	5.3
Stony Brook Pond	72113	Norfolk	6.97	22.5
Storrow Pond	72115	Westwood	6.47	5.8
Stump Pond	35085	Gardner	5.09	0.3
Sucker Brook	3625975	New Braintree	6.41	5.2
Thompsons Pond	36155	Spencer	6.53	6.2
Todd Brook	3316050	Charlemont	6.8	3.7
Torrey Creek	5334075	Seekonk	6.36	15.4
Towne Brook	3524200	Royalston	6.11	1.4
Trout Pond 2	31042	Tolland	6.34	2.3
Tully Pond	35089	Orange	6.32	3.3
Turner Pond	95151	New Bedford	4.84	-1.6
Underwood Brook	3314650	Heath	6.97	7.3
Upper Attitash Pond	84072	Amesbury	7.2	15.7
Upper Mystic Lake	71043	Winchester	7.47	41.5
Upper Naukeag Lake	35090	Ashburnham	5.99	0.8
Upper Spectacle Pond	31044	Sandisfield	6.49	9
Valley Brook	3107700	Granville	6.4	3.8
Vincent Brook	3314550	Colrain	7.39	15.4
Walker Brook	3210300	Becket	6.73	11.1
Wallis/Whitin Reservoir	51179	Douglas	5.29	0
Wellington Brook	4230325	Oxford	6.28	18.2
West Br Swift River	3626800	Shutesbury	5.58	0.4
West Br Ware River	3628175	Hubbardston	6.26	1.9
Whitehall Reservoir	82120	Hopkinton	6.19	4.4
Wilder Brook	3523950	Gardner	5.22	0.1
Williams River	2104100	West Stockbridge	7.86	118.8
Winnecunnet Pond	62213	Norton	6.7	10.6
Wright Pond	81160	Ashby	6.32	2.6