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Tap water quality report

Saint Marys, PA

EPA monitoring detected 15 contaminants across the 1 water supplier serving Saint Marys. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
19,588
people served
15
contaminants found
Pennsylvania rankings Lead in Pennsylvania PFAS in Pennsylvania

What was found in Saint Marys's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
560 µg/L 5.6%
of the EPA limit 10000 µg/L
 1/1 SYR4
Fluoride
535 µg/L 13%
of the EPA limit 4000 µg/L
 1/1 SYR4
Copper
149 µg/L 11%
of the EPA limit 1300 µg/L
 1/1 SYR4
Total Haloacetic Acids (HAA5)
73.3 µg/L 122%
of the EPA limit, in the worst sample — 60 µg/L
 1/1 SYR4
TTHM
72 µg/L 90%
of the EPA limit 80 µg/L
 1/1 SYR4
Bromodichloromethane
60 µg/L
No EPA limit set
 1/1 SYR4
Chloroform
60 µg/L
No EPA limit set
 1/1 SYR4
Lead
59 µg/L 393%
of the EPA limit, in the worst sample — 15 µg/L
 1/1 SYR4
Barium
42.4 µg/L 2.1%
of the EPA limit 2000 µg/L
 1/1 SYR4
Dichloroacetic Acid
39.5 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
38 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
2 µg/L
No EPA limit set
 1/1 SYR4
Monochloroacetic Acid
1.2 µg/L
No EPA limit set
 1/1 SYR4
Bromoform
0.6080 µg/L
No EPA limit set
 1/1 SYR4
Lead
0.0033 mg/L 22%
of the EPA limit 0.0150 mg/L
 1/1 LCR
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 single worst sample on record — 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 Saint Marys

SupplierPopulation 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, Total Haloacetic Acids (HAA5), TTHM. The full list, with the highest level found 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.