What was found in Swansea'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 | 2343 µg/L 23% of the EPA limit 10000 µg/L Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Fluoride | 1300 µg/L 33% of the EPA limit 4000 µg/L Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| TTHM | 136.25 µg/L 170% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Copper | 95 µg/L 7.3% of the EPA limit 1300 µg/L Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Bromoform | 80.3 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Chloroform | 50.925 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 50.725 µg/L 85% of the EPA limit 60 µg/L Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 33.045 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 27.55 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 21.67 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 19.11 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 13.34 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 6.395 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 3.06 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2019 | 1/1 | SYR4 |
| Pfba | 0.0109 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2024 | 1/1 | UCMR-5 |
| PFHXS | 0.0077 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2024 | 1/1 | UCMR-5 |
| PFOA | 0.0051 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2024 | 1/1 | UCMR-5 |
| Pfpea | 0.0049 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2024 | 1/1 | UCMR-5 |
| Pfhxa | 0.0040 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2024 | 1/1 | UCMR-5 |
| PFBS | 0.0035 µg/L No EPA limit set Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: SWANSEA WATER DISTRICT · 17,375 people · 2025 | 1/1 | LCR |
Water suppliers serving Swansea
| Supplier | Population served |
|---|---|
| SWANSEA WATER DISTRICT | 17,375 |
Frequently asked questions about Swansea tap water
Is Swansea tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Swansea. 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 Swansea?
1 public water supplier report drinking-water monitoring for Swansea, Massachusetts to the EPA. Each is listed above with its population served.
What contaminants are in Swansea's water?
The contaminants EPA monitoring detected in Swansea include Nitrate, Fluoride, TTHM, Copper, Bromoform. 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.