What was found in Lexington'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-Nitrite | 492 µg/L 4.9% of the EPA limit 10000 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2019
Highest in the city: 5500 µg/L — LEXINGTON · 2,086 people · 2019 | 3/3 | SYR4 |
| Barium | 478.8 µg/L 24% of the EPA limit 2000 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 3/3 | SYR4 |
| Fluoride | 404 µg/L 10% of the EPA limit 4000 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 1/3 | SYR4 |
| Nitrate | 250 µg/L 2.5% of the EPA limit 10000 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 1/3 | SYR4 |
| Copper | 44.1 µg/L 3.4% of the EPA limit 1300 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2017
Highest in the city: 98.655 µg/L — LEXINGTON · 2,086 people · 2018 | 2/3 | SYR4 |
| Chromium | 39.52 µg/L 40% of the EPA limit 100 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 2/3 | SYR4 |
| Lead | 27.431 µg/L 183% of the EPA limit, at the 95th percentile of samples — 15 µg/L Highest in the city: LEXINGTON · 2,086 people · 2018 | 1/3 | SYR4 |
| Combined Uranium | 21.195 µg/L 71% of the EPA limit 30 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 3/3 | SYR4 |
| Xylenes, Total | 14.385 µg/L 0.1% of the EPA limit 10000 µg/L Highest in the city: CLEVELAND CO RW,S,G&SWMD #1 · 80 people · 2019 | 1/3 | SYR4 |
| TTHM | 6 µg/L 7.5% of the EPA limit 80 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2019
Highest in the city: 14.26 µg/L — CLEVELAND CO RW,S,G&SWMD #1 · 80 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 13.91 pCi/L 93% of the EPA limit 15 pCi/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 3/3 | SYR4 |
| Selenium | 13.895 µg/L 28% of the EPA limit 50 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 2/3 | SYR4 |
| Gross Beta Particle Activity | 10.4235 pCi/L No EPA limit set Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 2/3 | SYR4 |
| Bromoform | 6 µg/L No EPA limit set Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2019
Highest in the city: 7.44 µg/L — LEXINGTON · 2,086 people · 2019 | 3/3 | SYR4 |
| Arsenic | 5.89 µg/L 59% of the EPA limit 10 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 2/3 | SYR4 |
| Bromodichloromethane | 5.05 µg/L No EPA limit set Highest in the city: CLEVELAND CO RW,S,G&SWMD #1 · 80 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 4.11 µg/L No EPA limit set Highest in the city: CLEVELAND CO RW,S,G&SWMD #1 · 80 people · 2019 | 2/3 | SYR4 |
| Trichloroethylene | 3.789 µg/L 76% of the EPA limit 5 µg/L Highest in the city: LEXINGTON · 2,086 people · 2019 | 1/3 | SYR4 |
| Chloroform | 3.41 µg/L No EPA limit set Highest in the city: CLEVELAND CO RW,S,G&SWMD #1 · 80 people · 2019 | 1/3 | SYR4 |
| Diquat | 3.12 µg/L 16% of the EPA limit 20 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2019 | 1/3 | SYR4 |
| Ethylbenzene | 2.665 µg/L 0.4% of the EPA limit 700 µg/L Highest in the city: CLEVELAND CO RW,S,G&SWMD #1 · 80 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.57 µg/L No EPA limit set Highest in the city: LEXINGTON · 2,086 people · 2019 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.375 µg/L 4% of the EPA limit 60 µg/L Highest in the city: LEXINGTON · 2,086 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.468 pCi/L 29% of the EPA limit 5 pCi/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018
Highest in the city: 1.684 pCi/L — CLEVELAND CO RW,S,G&SWMD #1 · 80 people · 2019 | 2/3 | SYR4 |
| Dichloromethane | 1.06 µg/L 21% of the EPA limit 5 µg/L Highest in the city: LEXINGTON · 2,086 people · 2019 | 1/3 | SYR4 |
| Mercury | 0.0980 µg/L 4.9% of the EPA limit 2 µg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2018 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: JOSEPH HARP CORR INST · 3,000 people · 2023
Highest in the city: 0.0065 mg/L — LEXINGTON · 2,086 people · 2026 | 3/3 | 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 Lexington
| Supplier | Population served |
|---|---|
| JOSEPH HARP CORR INST | 3,000 |
| LEXINGTON | 2,086 |
| CLEVELAND CO RW,S,G&SWMD #1 | 80 |
Frequently asked questions about Lexington tap water
Is Lexington tap water safe to drink?
EPA testing detected 27 contaminants in the water serving Lexington. 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 Lexington?
3 public water suppliers report drinking-water monitoring for Lexington, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Lexington's water?
The contaminants EPA monitoring detected in Lexington include Nitrate-Nitrite, Barium, Fluoride, Nitrate, 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.