What was found in Jefferson City'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 | 3180 µg/L 32% of the EPA limit 10000 µg/L | 2/6 | SYR4 |
| Nitrate-Nitrite | 3180 µg/L 32% of the EPA limit 10000 µg/L | 4/6 | SYR4 |
| Fluoride | 1290 µg/L 32% of the EPA limit 4000 µg/L | 5/6 | SYR4 |
| Copper | 449 µg/L 35% of the EPA limit 1300 µg/L | 6/6 | SYR4 |
| Barium | 204 µg/L 10% of the EPA limit 2000 µg/L | 5/6 | SYR4 |
| Lithium | 92.7 µg/L No EPA limit set | 1/6 | UCMR-5 |
| TTHM | 86.7 µg/L 108% of the EPA limit, in the worst sample — 80 µg/L | 5/6 | SYR4 |
| Chloroform | 73.1 µg/L No EPA limit set | 5/6 | SYR4 |
| Lead | 59.2 µg/L 395% of the EPA limit, in the worst sample — 15 µg/L | 6/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 41.2 µg/L 69% of the EPA limit 60 µg/L | 4/6 | SYR4 |
| Dichloroacetic Acid | 37.1 µg/L No EPA limit set | 5/6 | SYR4 |
| Xylenes, Total | 17.8 µg/L 0.2% of the EPA limit 10000 µg/L | 2/6 | SYR4 |
| Bromodichloromethane | 12.5 µg/L No EPA limit set | 5/6 | SYR4 |
| Chromium | 9 µg/L 9% of the EPA limit 100 µg/L | 4/6 | SYR4 |
| Dibromochloromethane | 8.2 µg/L No EPA limit set | 4/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 8 pCi/L 53% of the EPA limit 15 pCi/L | 2/6 | SYR4 |
| Monochloroacetic Acid | 4.8 µg/L No EPA limit set | 2/6 | SYR4 |
| Dibromoacetic Acid | 4.7 µg/L No EPA limit set | 1/6 | SYR4 |
| Monobromoacetic Acid | 3.9 µg/L No EPA limit set | 1/6 | SYR4 |
| Combined Radium (-226 And -228) | 3.5 pCi/L 70% of the EPA limit 5 pCi/L | 3/6 | SYR4 |
| Trichloroacetic Acid | 3.2 µg/L No EPA limit set | 2/6 | SYR4 |
| Selenium | 3 µg/L 6% of the EPA limit 50 µg/L | 1/6 | SYR4 |
| Ethylbenzene | 2.82 µg/L 0.4% of the EPA limit 700 µg/L | 1/6 | SYR4 |
| Arsenic | 2.7 µg/L 27% of the EPA limit 10 µg/L | 2/6 | SYR4 |
| Bromoform | 2.6 µg/L No EPA limit set | 2/6 | SYR4 |
| Atrazine | 0.8200 µg/L 27% of the EPA limit 3 µg/L | 1/6 | SYR4 |
| 2,4-D | 0.8000 µg/L 1.1% of the EPA limit 70 µg/L | 1/6 | SYR4 |
| Antimony, Total | 0.6000 µg/L 10% of the EPA limit 6 µg/L | 1/6 | SYR4 |
| Lead | 0.0088 mg/L 59% of the EPA limit 0.0150 mg/L | 6/6 | LCR |
| Pfba | 0.0072 µg/L No EPA limit set | 1/6 | UCMR-5 |
| PFOA | 0.0058 µg/L No EPA limit set | 1/6 | UCMR-5 |
Water suppliers serving Jefferson City
| Supplier | Population served |
|---|---|
| MO AMERICAN JEFFERSON CITY DISTRICT | 30,075 |
| COLE COUNTY PWSD 1 | 16,548 |
| COLE COUNTY PWSD 2 | 13,107 |
| COLE COUNTY PWSD 4 | 7,568 |
| MO AMERICAN LAKE CARMEL | 215 |
| MO AMERICAN JEFFERSON CITY NORTH | 95 |
Frequently asked questions about Jefferson City tap water
Is Jefferson City tap water safe to drink?
EPA testing detected 31 contaminants in the water serving Jefferson City. 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 Jefferson City?
6 public water suppliers report drinking-water monitoring for Jefferson City, Missouri to the EPA. Each is listed above with its population served.
What contaminants are in Jefferson City's water?
The contaminants EPA monitoring detected in Jefferson City include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.