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Tap water quality report

St Thomas, PA

EPA monitoring detected 19 contaminants across the 1 water supplier serving St Thomas. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
12,589
people served
19
contaminants found
Pennsylvania rankings Lead in Pennsylvania PFAS in Pennsylvania

What was found in St Thomas'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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
4020 µg/L 40%
of the EPA limit 10000 µg/L
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Fluoride
1156 µg/L 29%
of the EPA limit 4000 µg/L
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Monochloroacetic Acid
800.432 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Copper
138.65 µg/L 11%
of the EPA limit 1300 µg/L
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Lead
86.75 µg/L 578%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Barium
65 µg/L 3.3%
of the EPA limit 2000 µg/L
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
59.945 µg/L 100%
of the EPA limit 60 µg/L
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
TTHM
59.105 µg/L 74%
of the EPA limit 80 µg/L
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Chloroform
50.525 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Trichloroacetic Acid
34.3 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Dichloroacetic Acid
32 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Monobromoacetic Acid
32 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Lithium
19 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2025
1/1 UCMR-5
Bromodichloromethane
8.9 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Bromoform
3 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Dibromochloromethane
3 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
Xylenes, Total
1.4515 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2019
1/1 SYR4
6:2 Fts
0.0097 µg/L
No EPA limit set
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2025
1/1 UCMR-5
Lead
0.0039 mg/L 26%
of the EPA limit 0.0150 mg/L
Main supplier: BEAR VALLEY JOINT AUTH · 12,589 people · 2022
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 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 St Thomas

SupplierPopulation served
BEAR VALLEY JOINT AUTH 12,589

Frequently asked questions about St Thomas tap water

Is St Thomas tap water safe to drink?

EPA testing detected 19 contaminants in the water serving St Thomas. 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 St Thomas?

1 public water supplier report drinking-water monitoring for St Thomas, Pennsylvania to the EPA. Each is listed above with its population served.

What contaminants are in St Thomas's water?

The contaminants EPA monitoring detected in St Thomas include Nitrate, Fluoride, Monochloroacetic Acid, Copper, Lead. 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.