What was found in Rison'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 |
|---|---|---|---|
| Copper | 392 µg/L 30% of the EPA limit 1300 µg/L Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2017
Highest in the city: 1432 µg/L — CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2018 | 3/3 | SYR4 |
| Fluoride | 1180 µg/L 30% of the EPA limit 4000 µg/L Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019 | 1/3 | SYR4 |
| Nitrate-Nitrite | 497 µg/L 5% of the EPA limit 10000 µg/L Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019 | 1/3 | SYR4 |
| Nitrate | 490 µg/L 4.9% of the EPA limit 10000 µg/L Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019 | 1/3 | SYR4 |
| Lithium | 25 µg/L No EPA limit set Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2025 | 1/3 | UCMR-5 |
| TTHM | 3.085 µg/L 3.9% of the EPA limit 80 µg/L Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 11.63 µg/L — CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 6.24 pCi/L No EPA limit set Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 7.28 pCi/L — RISON WATERWORKS · 1,344 people · 2019 | 3/3 | SYR4 |
| Lead | 3 µg/L 20% of the EPA limit 15 µg/L Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 7.025 µg/L — RISON WATERWORKS · 1,344 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 6.45 µg/L 11% of the EPA limit 60 µg/L Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 6.72 µg/L — CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2019 | 3/3 | SYR4 |
| Chloroform | 2.362 µg/L No EPA limit set Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 5.513 µg/L — RISON WATERWORKS · 1,344 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 1.681 µg/L No EPA limit set Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 3.44 µg/L — CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 1.358 µg/L No EPA limit set Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 3.075 µg/L — CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 2.245 µg/L No EPA limit set Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 2.3 µg/L — CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 1.29 µg/L No EPA limit set Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 2.295 µg/L — CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 2.2 µg/L No EPA limit set Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019 | 1/3 | SYR4 |
| Vinyl Chloride | 1.93 µg/L 97% of the EPA limit 2 µg/L Highest in the city: RISON WATERWORKS · 1,344 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.57 µg/L No EPA limit set Highest in the city: CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 1.1 µg/L No EPA limit set Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019
Highest in the city: 1.57 µg/L — CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2019 | 3/3 | SYR4 |
| Bromoform | 1.1 µg/L No EPA limit set Highest in the city: CLEVELAND CO RURAL WATER USERS ASSOC · 2,244 people · 2019 | 2/3 | SYR4 |
| Xylenes, Total | 0.6000 µg/L 0% of the EPA limit 10000 µg/L Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: HWY 63 WATER ASSOCIATION · 7,187 people · 2025
Highest in the city: 0.0040 mg/L — RISON WATERWORKS · 1,344 people · 2002 | 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 Rison
| Supplier | Population served |
|---|---|
| HWY 63 WATER ASSOCIATION | 7,187 |
| CLEVELAND CO RURAL WATER USERS ASSOC | 2,244 |
| RISON WATERWORKS | 1,344 |
Frequently asked questions about Rison tap water
Is Rison tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Rison. 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 Rison?
3 public water suppliers report drinking-water monitoring for Rison, Arkansas to the EPA. Each is listed above with its population served.
What contaminants are in Rison's water?
The contaminants EPA monitoring detected in Rison include Copper, Fluoride, Nitrate-Nitrite, Nitrate, Lithium. 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.