Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2011-06-01 → 2011-06-30 |
| MCL | Health-based | Resolved | 2011-06-01 → 2011-06-30 |
| MCL | Health-based | Resolved | 2011-06-01 → 2011-06-30 |
| MCL | Health-based | Resolved | 2011-06-01 → 2011-06-30 |
| Other | Monitoring | Resolved | 2025-07-01 |
| Other | Monitoring | Resolved | 2025-07-01 |
| RPT | Monitoring | Resolved | 2024-10-17 |
| RPT | Monitoring | Resolved | 2024-10-17 |
| RPT | Monitoring | Resolved | 2024-10-17 |
| RPT | Monitoring | Resolved | 2024-10-17 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 181 µg/L 14% of the EPA limit 1300 µg/L | 50/50 | SYR4 | 2014–2017 |
| Nitrate-Nitrite | 330 µg/L 3.3% of the EPA limit 10000 µg/L | 32/80 | SYR4 | 2012–2019 |
| Lead | 6.51 µg/L 43% of the EPA limit 15 µg/L | 27/50 | SYR4 | 2014–2017 |
| Lead | 0.0039 mg/L 26% of the EPA limit 0.0150 mg/L | 23/23 | LCR | 2023 |
| Barium | 199 µg/L 10% of the EPA limit 2000 µg/L | 10/10 | SYR4 | 2014–2017 |
| Fluoride | 1460 µg/L 37% of the EPA limit 4000 µg/L | 10/10 | SYR4 | 2014–2017 |
| Chromium | 10.2 µg/L 10% of the EPA limit 100 µg/L | 6/10 | SYR4 | 2014–2017 |
| Bromodichloromethane | 0.7600 µg/L No EPA limit set | 5/17 | SYR4 | 2013–2019 |
| Chloroform | 0.7800 µg/L No EPA limit set | 4/17 | SYR4 | 2013–2019 |
| Dibromochloromethane | 1.04 µg/L No EPA limit set | 3/17 | SYR4 | 2013–2019 |
| Cadmium | 0.2800 µg/L 5.6% of the EPA limit 5 µg/L | 2/10 | SYR4 | 2014–2017 |
| TTHM | 2.31 µg/L 2.9% of the EPA limit 80 µg/L | 2/7 | SYR4 | 2013–2019 |
| Xylenes, Total | 1.33 µg/L 0% of the EPA limit 10000 µg/L | 2/10 | SYR4 | 2014–2017 |
| Arsenic | 2.11 µg/L 21% of the EPA limit 10 µg/L | 1/10 | SYR4 | 2014–2017 |
| Bromoform | 0.6400 µg/L No EPA limit set | 1/17 | SYR4 | 2013–2019 |
| Combined Radium (-226 And -228) | 1.7 pCi/L 34% of the EPA limit 5 pCi/L | 1/5 | SYR4 | 2016 |
| Dichloroacetic Acid | 1.13 µg/L No EPA limit set | 1/7 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 1.13 µg/L 1.9% of the EPA limit 60 µg/L | 1/7 | SYR4 | 2013–2019 |
| Lithium | 10 µg/L No EPA limit set | 1/10 | UCMR-5 | 2023 |
81 contaminants tested, none detected
Utility contact
Frequently asked questions about Jefferson County Pwsd 7
Is Jefferson County Pwsd 7 tap water safe to drink?
EPA monitoring detected 19 contaminants in Jefferson County Pwsd 7's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Jefferson County Pwsd 7's water?
EPA monitoring detected Copper, Nitrate-Nitrite, Lead, Lead, Barium, and others. The full list with the level and data source for each is above.
How many people does Jefferson County Pwsd 7 serve?
Jefferson County Pwsd 7 reports serving 6,100 people in Missouri, per its EPA record.
Has Jefferson County Pwsd 7 had any water quality violations?
The EPA has 13 violations on file for Jefferson County Pwsd 7, of which 4 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
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.