What was found in Piedmont'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 | 1310 µg/L 13% of the EPA limit 10000 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 1082 µg/L 11% of the EPA limit 10000 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Fluoride | 488.5 µg/L 12% of the EPA limit 4000 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2017 | 1/1 | SYR4 |
| Barium | 197.25 µg/L 9.9% of the EPA limit 2000 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2017 | 1/1 | SYR4 |
| Copper | 181.7 µg/L 14% of the EPA limit 1300 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2017 | 1/1 | SYR4 |
| Combined Uranium | 95.71 µg/L 319% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2018 | 1/1 | SYR4 |
| Lithium | 49.7 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2023 | 1/1 | UCMR-5 |
| Gross Alpha, Excl. Radon And U | 46.0825 pCi/L 307% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2018 | 1/1 | SYR4 |
| Chromium | 32.05 µg/L 32% of the EPA limit 100 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2017 | 1/1 | SYR4 |
| TTHM | 28.23 µg/L 35% of the EPA limit 80 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 27.4 pCi/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2018 | 1/1 | SYR4 |
| Selenium | 20.48 µg/L 41% of the EPA limit 50 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2017 | 1/1 | SYR4 |
| Arsenic | 12.115 µg/L 121% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 11.055 µg/L 18% of the EPA limit 60 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 8.495 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Lead | 7.9 µg/L 53% of the EPA limit 15 µg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2017 | 1/1 | SYR4 |
| Bromodichloromethane | 6 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Bromoform | 5.12 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 4.73 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 4.142 pCi/L 83% of the EPA limit 5 pCi/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2018 | 1/1 | SYR4 |
| Dichloroacetic Acid | 3.76 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Chloroform | 3.155 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 1/1 | SYR4 |
| Pfba | 0.0059 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2023 | 1/1 | UCMR-5 |
| Pfpea | 0.0036 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2023 | 1/1 | UCMR-5 |
| Pfhxa | 0.0033 µg/L No EPA limit set Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2023 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2023 | 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 Piedmont
| Supplier | Population served |
|---|---|
| PIEDMONT MUNICIPAL AUTHORITY | 7,542 |
Frequently asked questions about Piedmont tap water
Is Piedmont tap water safe to drink?
EPA testing detected 27 contaminants in the water serving Piedmont. 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 Piedmont?
1 public water supplier report drinking-water monitoring for Piedmont, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Piedmont's water?
The contaminants EPA monitoring detected in Piedmont include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Copper. 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.