What was found in Plymouth's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 1975 µg/L 20% of the EPA limit 10000 µg/L Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019
Highest in the city: 4450 µg/L — HERRING COVE CONDOMINIUMS TRUST · 25 people · 2019 | 7/7 | SYR4 |
| Copper | 105.25 µg/L 8.1% of the EPA limit 1300 µg/L Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019
Highest in the city: 236.99999999999994 µg/L — AQUARION WATER COMPANY PONDS OF PLYMOUTH · 2,267 people · 2018 | 5/7 | SYR4 |
| Fluoride | 140 µg/L 3.5% of the EPA limit 4000 µg/L Highest in the city: AGAWAM SPRINGS WATER COMPANY · 2,380 people · 2018 | 1/7 | SYR4 |
| Barium | 51.20000000000002 µg/L 2.6% of the EPA limit 2000 µg/L Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2017 | 3/7 | SYR4 |
| TTHM | 21.025 µg/L 26% of the EPA limit 80 µg/L Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019 | 3/7 | SYR4 |
| Bromoform | 14.505 µg/L No EPA limit set Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019 | 3/7 | SYR4 |
| Lead | 14.05 µg/L 94% of the EPA limit 15 µg/L Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2016 | 3/7 | SYR4 |
| Nitrite | 10 µg/L 1% of the EPA limit 1000 µg/L Highest in the city: MASAC PLYMOUTH · 210 people · 2017 | 1/7 | SYR4 |
| Bromodichloromethane | 2.365999999999999 µg/L No EPA limit set Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019
Highest in the city: 7.144 µg/L — AGAWAM SPRINGS WATER COMPANY · 2,380 people · 2018 | 3/7 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.9504999999999995 µg/L 4.9% of the EPA limit 60 µg/L Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019
Highest in the city: 5.603999999999999 µg/L — AGAWAM SPRINGS WATER COMPANY · 2,380 people · 2019 | 2/7 | SYR4 |
| Dibromochloromethane | 5.258000000000001 µg/L No EPA limit set Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019 | 3/7 | SYR4 |
| Chloroform | 1.5815000000000001 µg/L No EPA limit set Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019
Highest in the city: 4.339 µg/L — AGAWAM SPRINGS WATER COMPANY · 2,380 people · 2018 | 3/7 | SYR4 |
| Dibromoacetic Acid | 2.8289999999999993 µg/L No EPA limit set Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019 | 2/7 | SYR4 |
| Dichloroacetic Acid | 1 µg/L No EPA limit set Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019
Highest in the city: 2.7329999999999997 µg/L — AGAWAM SPRINGS WATER COMPANY · 2,380 people · 2018 | 2/7 | SYR4 |
| Monochloroacetic Acid | 1.844 µg/L No EPA limit set Highest in the city: AGAWAM SPRINGS WATER COMPANY · 2,380 people · 2018 | 1/7 | SYR4 |
| Tetrachloroethylene | 1.7339999999999998 µg/L 35% of the EPA limit 5 µg/L Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019 | 1/7 | SYR4 |
| Carbofuran | 0.9000 µg/L 2.3% of the EPA limit 40 µg/L Highest in the city: HERRING COVE CONDOMINIUMS TRUST · 25 people · 2018 | 1/7 | SYR4 |
| Trichloroethylene | 0.8005 µg/L 16% of the EPA limit 5 µg/L Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2019 | 1/7 | SYR4 |
| Pfhxa | 0.0049 µg/L No EPA limit set Highest in the city: AQUARION WATER COMPANY, PINEHILLS · 9,478 people · 2023 | 1/7 | UCMR-5 |
| PFBS | 0.0040 µg/L No EPA limit set Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2024 | 1/7 | UCMR-5 |
| Lead | 0.0025 mg/L 17% of the EPA limit 0.0150 mg/L Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2024
Highest in the city: 0.0032 mg/L — LONG POND REALTY TRUST · 90 people · 2025 | 7/7 | LCR |
| Pfpea | 0.0031 µg/L No EPA limit set Main supplier: PLYMOUTH WATER DEPARTMENT · 47,100 people · 2024 | 1/7 | UCMR-5 |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Plymouth
| Supplier | Population served |
|---|---|
| PLYMOUTH WATER DEPARTMENT | 47,100 |
| AQUARION WATER COMPANY, PINEHILLS | 9,478 |
| AGAWAM SPRINGS WATER COMPANY | 2,380 |
| AQUARION WATER COMPANY PONDS OF PLYMOUTH | 2,267 |
| MASAC PLYMOUTH | 210 |
| LONG POND REALTY TRUST | 90 |
| HERRING COVE CONDOMINIUMS TRUST | 25 |
Frequently asked questions about Plymouth tap water
Is Plymouth tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Plymouth. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Plymouth?
7 public water suppliers report drinking-water monitoring for Plymouth, Massachusetts to the EPA. Each is listed above with its population served.
What contaminants are in Plymouth's water?
The contaminants EPA monitoring detected in Plymouth include Nitrate, Copper, Fluoride, Barium, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.