What was found in Ozark'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 | 923 µg/L 23% of the EPA limit 4000 µg/L Main supplier: OZARK WATERWORKS · 4,368 people · 2019 | 1/4 | SYR4 |
| Nitrate-Nitrite | 854.4999999999998 µg/L 8.5% of the EPA limit 10000 µg/L Main supplier: OZARK WATERWORKS · 4,368 people · 2019 | 1/4 | SYR4 |
| Nitrate | 800 µg/L 8% of the EPA limit 10000 µg/L Main supplier: OZARK WATERWORKS · 4,368 people · 2019 | 1/4 | SYR4 |
| Copper | 85.21999999999994 µg/L 6.6% of the EPA limit 1300 µg/L Main supplier: OZARK WATERWORKS · 4,368 people · 2017
Highest in the city: 453.99999999999966 µg/L — RIVERSOUTH RURAL WATER DIST · 4,275 people · 2019 | 4/4 | SYR4 |
| TTHM | 47.67999999999998 µg/L 60% of the EPA limit 80 µg/L Main supplier: OZARK WATERWORKS · 4,368 people · 2019
Highest in the city: 61.17999999999999 µg/L — WATALULA WATER ASS0CIATION · 2,278 people · 2019 | 4/4 | SYR4 |
| Chloroform | 37.625 µg/L No EPA limit set Main supplier: OZARK WATERWORKS · 4,368 people · 2019
Highest in the city: 52.81999999999999 µg/L — WATALULA WATER ASS0CIATION · 2,278 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 20.4 µg/L 34% of the EPA limit 60 µg/L Main supplier: OZARK WATERWORKS · 4,368 people · 2019
Highest in the city: 27.459999999999994 µg/L — RIVERSOUTH RURAL WATER DIST · 4,275 people · 2019 | 4/4 | SYR4 |
| Lead | 16.999999999999986 µg/L 113% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: OZARK WATERWORKS · 4,368 people · 2019
Highest in the city: 21.159999999999986 µg/L — WATALULA WATER ASS0CIATION · 2,278 people · 2018 | 4/4 | SYR4 |
| Trichloroacetic Acid | 12.989999999999998 µg/L No EPA limit set Main supplier: OZARK WATERWORKS · 4,368 people · 2019
Highest in the city: 16.59999999999999 µg/L — RIVERSOUTH RURAL WATER DIST · 4,275 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 9.86 µg/L No EPA limit set Main supplier: OZARK WATERWORKS · 4,368 people · 2019
Highest in the city: 14.399999999999995 µg/L — RIVERSOUTH RURAL WATER DIST · 4,275 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 6.3 µg/L No EPA limit set Main supplier: OZARK WATERWORKS · 4,368 people · 2019
Highest in the city: 8.94 µg/L — WATALULA WATER ASS0CIATION · 2,278 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 3.1 µg/L No EPA limit set Highest in the city: WATALULA WATER ASS0CIATION · 2,278 people · 2019 | 2/4 | SYR4 |
| Gross Beta Particle Activity | 2.9 pCi/L No EPA limit set Main supplier: OZARK WATERWORKS · 4,368 people · 2019 | 1/4 | SYR4 |
| Dibromochloromethane | 1.3 µg/L No EPA limit set Main supplier: OZARK WATERWORKS · 4,368 people · 2019
Highest in the city: 2.2 µg/L — WATALULA WATER ASS0CIATION · 2,278 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 1.1 µg/L No EPA limit set Highest in the city: WATALULA WATER ASS0CIATION · 2,278 people · 2019 | 2/4 | SYR4 |
| Monobromoacetic Acid | 1.1 µg/L No EPA limit set Main supplier: OZARK WATERWORKS · 4,368 people · 2019 | 1/4 | SYR4 |
| Benzo(A)Pyrene | 0.0800 µg/L 40% of the EPA limit 0.2000 µg/L Main supplier: OZARK WATERWORKS · 4,368 people · 2019 | 1/4 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: OZARK WATERWORKS · 4,368 people · 2025
Highest in the city: 0.0120 mg/L — DENNING WATERWORKS · 712 people · 2002 | 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 Ozark
| Supplier | Population served |
|---|---|
| OZARK WATERWORKS | 4,368 |
| RIVERSOUTH RURAL WATER DIST | 4,275 |
| WATALULA WATER ASS0CIATION | 2,278 |
| DENNING WATERWORKS | 712 |
Frequently asked questions about Ozark tap water
Is Ozark tap water safe to drink?
EPA testing detected 18 contaminants in the water serving Ozark. 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 Ozark?
4 public water suppliers report drinking-water monitoring for Ozark, Arkansas to the EPA. Each is listed above with its population served.
What contaminants are in Ozark's water?
The contaminants EPA monitoring detected in Ozark include Fluoride, Nitrate-Nitrite, Nitrate, Copper, 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.