What was found in Saint Marys'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 | 560 µg/L 5.6% of the EPA limit 10000 µg/L Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Fluoride | 535 µg/L 13% of the EPA limit 4000 µg/L Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2012 | 1/1 | SYR4 |
| Copper | 101.67 µg/L 7.8% of the EPA limit 1300 µg/L Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| TTHM | 60.03 µg/L 75% of the EPA limit 80 µg/L Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 57.67 µg/L 96% of the EPA limit 60 µg/L Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Chloroform | 47.62 µg/L No EPA limit set Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Lead | 46.7 µg/L 311% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Barium | 42.4 µg/L 2.1% of the EPA limit 2000 µg/L Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2012 | 1/1 | SYR4 |
| Dichloroacetic Acid | 34.725 µg/L No EPA limit set Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 31.09 µg/L No EPA limit set Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 11.86 µg/L No EPA limit set Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 1.719 µg/L No EPA limit set Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 1.2 µg/L No EPA limit set Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Bromoform | 0.6080 µg/L No EPA limit set Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0033 mg/L 22% of the EPA limit 0.0150 mg/L Main supplier: ST MARYS AREA WATER AUTH · 19,588 people · 2025 | 1/1 | LCR |
Water suppliers serving Saint Marys
| Supplier | Population served |
|---|---|
| ST MARYS AREA WATER AUTH | 19,588 |
Frequently asked questions about Saint Marys tap water
Is Saint Marys tap water safe to drink?
EPA testing detected 15 contaminants in the water serving Saint Marys. 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 Saint Marys?
1 public water supplier report drinking-water monitoring for Saint Marys, Pennsylvania to the EPA. Each is listed above with its population served.
What contaminants are in Saint Marys's water?
The contaminants EPA monitoring detected in Saint Marys include Nitrate, Fluoride, Copper, TTHM, Total Haloacetic Acids (HAA5). 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.