What was found in Canton'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 | 2085 µg/L 21% of the EPA limit 10000 µg/L Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Fluoride | 1122 µg/L 28% of the EPA limit 4000 µg/L Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Chlorite | 580 µg/L 58% of the EPA limit 1000 µg/L Main supplier: CANTON WATER DEPT · 22,766 people · 2018 | 1/1 | SYR4 |
| Copper | 160 µg/L 12% of the EPA limit 1300 µg/L Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| TTHM | 34.03 µg/L 43% of the EPA limit 80 µg/L Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 19 µg/L 32% of the EPA limit 60 µg/L Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Chloroform | 16.7 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 13.84 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 11.14 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 7.24 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 5.56 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 4.325 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 2.25 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| Bromoform | 1.923 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2019 | 1/1 | SYR4 |
| PFOA | 0.0050 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2024 | 1/1 | UCMR-5 |
| Pfpea | 0.0034 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2024 | 1/1 | UCMR-5 |
| Pfhxa | 0.0032 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2024 | 1/1 | UCMR-5 |
| 4:2 Fts | 0.0030 µg/L No EPA limit set Main supplier: CANTON WATER DEPT · 22,766 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: CANTON WATER DEPT · 22,766 people · 2025 | 1/1 | LCR |
Water suppliers serving Canton
| Supplier | Population served |
|---|---|
| CANTON WATER DEPT | 22,766 |
Frequently asked questions about Canton tap water
Is Canton tap water safe to drink?
EPA testing detected 19 contaminants in the water serving Canton. 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 Canton?
1 public water supplier report drinking-water monitoring for Canton, Massachusetts to the EPA. Each is listed above with its population served.
What contaminants are in Canton's water?
The contaminants EPA monitoring detected in Canton include Nitrate, Fluoride, Chlorite, Copper, 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.