What was found in Norristown's water
The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 9870 µg/L 99% of the EPA limit 10000 µg/L | 8/8 | SYR4 |
| Copper | 3300 µg/L 254% of the EPA limit, in the worst sample — 1300 µg/L | 8/8 | SYR4 |
| Barium | 950 µg/L 48% of the EPA limit 2000 µg/L | 7/8 | SYR4 |
| Fluoride | 170 µg/L 4.3% of the EPA limit 4000 µg/L | 2/8 | SYR4 |
| TTHM | 116.3 µg/L 145% of the EPA limit, in the worst sample — 80 µg/L | 7/8 | SYR4 |
| Chloroform | 94.9 µg/L No EPA limit set | 6/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 67 µg/L 112% of the EPA limit, in the worst sample — 60 µg/L | 4/8 | SYR4 |
| Lead | 56 µg/L 373% of the EPA limit, in the worst sample — 15 µg/L | 8/8 | SYR4 |
| Bromodichloromethane | 33.4 µg/L No EPA limit set | 5/8 | SYR4 |
| Lithium | 24.5 µg/L No EPA limit set | 2/8 | UCMR-5 |
| Dibromochloromethane | 20.2 µg/L No EPA limit set | 6/8 | SYR4 |
| Arsenic | 12 µg/L 120% of the EPA limit, in the worst sample — 10 µg/L | 2/8 | SYR4 |
| Trichloroacetic Acid | 11.3 µg/L No EPA limit set | 2/8 | SYR4 |
| Selenium | 10 µg/L 20% of the EPA limit 50 µg/L | 1/8 | SYR4 |
| Bromoform | 9.5 µg/L No EPA limit set | 3/8 | SYR4 |
| Dichloroacetic Acid | 9.5 µg/L No EPA limit set | 2/8 | SYR4 |
| Chromium | 8.1 µg/L 8.1% of the EPA limit 100 µg/L | 5/8 | SYR4 |
| Tetrachloroethylene | 4.7 µg/L 94% of the EPA limit 5 µg/L | 2/8 | SYR4 |
| Dibromoacetic Acid | 3.7 µg/L No EPA limit set | 3/8 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.3 µg/L 55% of the EPA limit 6 µg/L | 2/8 | SYR4 |
| Carbon Tetrachloride | 3.2 µg/L 64% of the EPA limit 5 µg/L | 2/8 | SYR4 |
| Antimony, Total | 0.6000 µg/L 10% of the EPA limit 6 µg/L | 1/8 | SYR4 |
| Atrazine | 0.2000 µg/L 6.7% of the EPA limit 3 µg/L | 1/8 | SYR4 |
| PFOS | 0.0579 µg/L No EPA limit set | 1/8 | UCMR-5 |
| PFOA | 0.0308 µg/L No EPA limit set | 1/8 | UCMR-5 |
| Lead | 0.0299 mg/L 199% above the EPA limit of 0.0150 mg/L | 8/8 | LCR |
| Combined Uranium | 0.0298 µg/L 0.1% of the EPA limit 30 µg/L | 1/8 | SYR4 |
| Pfpea | 0.0133 µg/L No EPA limit set | 2/8 | UCMR-5 |
| Pfhxa | 0.0117 µg/L No EPA limit set | 2/8 | UCMR-5 |
| Pfhpa | 0.0079 µg/L No EPA limit set | 1/8 | UCMR-5 |
| Pfba | 0.0070 µg/L No EPA limit set | 2/8 | UCMR-5 |
| PFNA | 0.0066 µg/L No EPA limit set | 1/8 | UCMR-5 |
| PFBS | 0.0053 µg/L No EPA limit set | 2/8 | UCMR-5 |
| PFHXS | 0.0050 µg/L No EPA limit set | 1/8 | UCMR-5 |
Water suppliers serving Norristown
| Supplier | Population served |
|---|---|
| PA AMERICAN NORRISTOWN | 88,885 |
| PA AMERICAN AUDUBON | 8,200 |
| MT VILLAGE MHP | 771 |
| HEREFORD EST MHP | 710 |
| AWC VALLEY FORGE CROSSING MHP | 250 |
| CREEKVIEW MHP | 200 |
| PAW BERRY HOLLOW | 70 |
| WOODLAND MHP | 61 |
Frequently asked questions about Norristown tap water
Is Norristown tap water safe to drink?
EPA testing detected 34 contaminants in the water serving Norristown. 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 Norristown?
8 public water suppliers report drinking-water monitoring for Norristown, Pennsylvania to the EPA. Each is listed above with its population served.
What contaminants are in Norristown's water?
The contaminants EPA monitoring detected in Norristown include Nitrate, Copper, Barium, Fluoride, 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.