What was found in Dexter'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 |
|---|---|---|---|
| Fluoride | 905 µg/L 23% of the EPA limit 4000 µg/L Main supplier: DEXTER PWS · 8,200 people · 2018 | 2/4 | SYR4 |
| Copper | 252 µg/L 19% of the EPA limit 1300 µg/L Main supplier: DEXTER PWS · 8,200 people · 2018
Highest in the city: 339.45 µg/L — STODDARD COUNTY PWSD 6 · 840 people · 2019 | 4/4 | SYR4 |
| Barium | 89.775 µg/L 4.5% of the EPA limit 2000 µg/L Main supplier: DEXTER PWS · 8,200 people · 2018
Highest in the city: 121.6 µg/L — STODDARD COUNTY PWSD 1 · 3,000 people · 2018 | 2/4 | SYR4 |
| Lithium | 88.7 µg/L No EPA limit set Main supplier: DEXTER PWS · 8,200 people · 2024 | 2/4 | UCMR-5 |
| TTHM | 57.42 µg/L 72% of the EPA limit 80 µg/L Main supplier: DEXTER PWS · 8,200 people · 2019 | 4/4 | SYR4 |
| Bromoform | 30.64 µg/L No EPA limit set Main supplier: DEXTER PWS · 8,200 people · 2019
Highest in the city: 38.315 µg/L — STODDARD COUNTY PWSD 1 · 3,000 people · 2019 | 4/4 | SYR4 |
| Nitrate-Nitrite | 31.1 µg/L 0.3% of the EPA limit 10000 µg/L Main supplier: DEXTER PWS · 8,200 people · 2019 | 2/4 | SYR4 |
| Dibromochloromethane | 18.82 µg/L No EPA limit set Main supplier: DEXTER PWS · 8,200 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 11.7 µg/L 19% of the EPA limit 60 µg/L Main supplier: DEXTER PWS · 8,200 people · 2019
Highest in the city: 17.37 µg/L — STODDARD COUNTY PWSD 6 · 840 people · 2019 | 2/4 | SYR4 |
| Chloroform | 1.6325 µg/L No EPA limit set Main supplier: DEXTER PWS · 8,200 people · 2019
Highest in the city: 16.11 µg/L — STODDARD COUNTY PWSD 6 · 840 people · 2019 | 2/4 | SYR4 |
| Dichloroacetic Acid | 2.329 µg/L No EPA limit set Main supplier: DEXTER PWS · 8,200 people · 2019
Highest in the city: 11.21 µg/L — STODDARD COUNTY PWSD 6 · 840 people · 2019 | 2/4 | SYR4 |
| Lead | 11 µg/L 73% of the EPA limit 15 µg/L Main supplier: DEXTER PWS · 8,200 people · 2018 | 4/4 | SYR4 |
| Dibromoacetic Acid | 8.826 µg/L No EPA limit set Main supplier: DEXTER PWS · 8,200 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 5.78 µg/L No EPA limit set Main supplier: DEXTER PWS · 8,200 people · 2019
Highest in the city: 6.516 µg/L — STODDARD COUNTY PWSD 6 · 840 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 6.363 µg/L No EPA limit set Highest in the city: STODDARD COUNTY PWSD 6 · 840 people · 2019 | 1/4 | SYR4 |
| Chromium | 2.566 µg/L 2.6% of the EPA limit 100 µg/L Main supplier: DEXTER PWS · 8,200 people · 2018
Highest in the city: 5.94 µg/L — STODDARD COUNTY PWSD 1 · 3,000 people · 2018 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 2.76 pCi/L 55% of the EPA limit 5 pCi/L Main supplier: DEXTER PWS · 8,200 people · 2018
Highest in the city: 4.625 pCi/L — STODDARD COUNTY PWSD 1 · 3,000 people · 2015 | 2/4 | SYR4 |
| Monobromoacetic Acid | 1.65 µg/L No EPA limit set Highest in the city: STODDARD COUNTY PWSD 6 · 840 people · 2019 | 1/4 | SYR4 |
| Carbon Tetrachloride | 0.5900 µg/L 12% of the EPA limit 5 µg/L Highest in the city: STODDARD COUNTY PWSD 1 · 3,000 people · 2018 | 1/4 | SYR4 |
| Lead | 0.0020 mg/L 14% of the EPA limit 0.0150 mg/L Main supplier: DEXTER PWS · 8,200 people · 2024
Highest in the city: 0.0115 mg/L — STODDARD COUNTY PWSD 4 · 1,530 people · 2024 | 4/4 | 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 Dexter
| Supplier | Population served |
|---|---|
| DEXTER PWS | 8,200 |
| STODDARD COUNTY PWSD 1 | 3,000 |
| STODDARD COUNTY PWSD 4 | 1,530 |
| STODDARD COUNTY PWSD 6 | 840 |
Frequently asked questions about Dexter tap water
Is Dexter tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Dexter. 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 Dexter?
4 public water suppliers report drinking-water monitoring for Dexter, Missouri to the EPA. Each is listed above with its population served.
What contaminants are in Dexter's water?
The contaminants EPA monitoring detected in Dexter include Fluoride, Copper, Barium, Lithium, TTHM. 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.