What was found in ZIP 72734
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 3121 µg/L 31% of the EPA limit 10000 µg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 1/4 | SYR4 |
| Nitrate | 2640 µg/L 26% of the EPA limit 10000 µg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 1/4 | SYR4 |
| Fluoride | 960 µg/L 24% of the EPA limit 4000 µg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 2/4 | SYR4 |
| Copper | 110 µg/L 8.5% of the EPA limit 1300 µg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2017
Highest in the ZIP: 886 µg/L — WASHINGTON WATER AUTHORITY WWA · 20,140 people · 2017 | 4/4 | SYR4 |
| Cyanide | 270 µg/L 135% of the EPA limit, at the 95th percentile of samples — 200 µg/L Highest in the ZIP: DECATUR WATERWORKS · 2,468 people · 2019 | 1/4 | SYR4 |
| TTHM | 69.985 µg/L 87% of the EPA limit 80 µg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019
Highest in the ZIP: 125 µg/L — WASHINGTON WATER AUTHORITY WWA · 20,140 people · 2019 | 4/4 | SYR4 |
| Chloroform | 44.535 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019
Highest in the ZIP: 117 µg/L — WASHINGTON WATER AUTHORITY WWA · 20,140 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 44.015 µg/L 73% of the EPA limit 60 µg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019
Highest in the ZIP: 68.565 µg/L — WASHINGTON WATER AUTHORITY WWA · 20,140 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 20.125 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019
Highest in the ZIP: 41.5 µg/L — GENTRY WATERWORKS · 7,910 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 22.42 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019
Highest in the ZIP: 26.055 µg/L — WASHINGTON WATER AUTHORITY WWA · 20,140 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 17.235 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 4/4 | SYR4 |
| Lead | 4 µg/L 27% of the EPA limit 15 µg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019
Highest in the ZIP: 10.7 µg/L — WASHINGTON WATER AUTHORITY WWA · 20,140 people · 2017 | 4/4 | SYR4 |
| Lithium | 10 µg/L No EPA limit set Highest in the ZIP: DECATUR WATERWORKS · 2,468 people · 2024 | 1/4 | UCMR-5 |
| Dibromochloromethane | 7.775 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 4.125 pCi/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 2/4 | SYR4 |
| Monochloroacetic Acid | 3.525 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019
Highest in the ZIP: 4.12 µg/L — WASHINGTON WATER AUTHORITY WWA · 20,140 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 2.2 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 4/4 | SYR4 |
| Bromoform | 1.975 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 1/4 | SYR4 |
| Monobromoacetic Acid | 1.7 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 4/4 | SYR4 |
| Chromium | 0.3240 µg/L 0.3% of the EPA limit 100 µg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019
Highest in the ZIP: 1.3 µg/L — DECATUR WATERWORKS · 2,468 people · 2019 | 2/4 | SYR4 |
| Simazine | 0.1100 µg/L 2.8% of the EPA limit 4 µg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2019 | 1/4 | SYR4 |
| PFBS | 0.0070 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2023 | 1/4 | UCMR-5 |
| Pfpea | 0.0055 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2023 | 1/4 | UCMR-5 |
| Pfhxa | 0.0038 µg/L No EPA limit set Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2023 | 1/4 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: SILOAM SPRINGS WATERWORKS · 21,430 people · 2025
Highest in the ZIP: 0.0030 mg/L — DECATUR WATERWORKS · 2,468 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.
Water suppliers serving ZIP 72734
| Supplier | State | Population served |
|---|---|---|
| SILOAM SPRINGS WATERWORKS | AR | 21,430 |
| WASHINGTON WATER AUTHORITY WWA | AR | 20,140 |
| GENTRY WATERWORKS | AR | 7,910 |
| DECATUR WATERWORKS | AR | 2,468 |
Frequently asked questions about ZIP 72734 tap water
Is the tap water in ZIP 72734 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 72734. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 72734?
4 public water suppliers report EPA drinking-water monitoring for ZIP 72734. Each is listed above with its population served.
What contaminants are in ZIP 72734's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, Cyanide, and others across this ZIP's suppliers. The full list with levels and sources is above.