What was found in ZIP 71643
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 |
|---|---|---|---|
| Fluoride | 1240 µg/L 31% of the EPA limit 4000 µg/L Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019 | 2/2 | SYR4 |
| Copper | 510 µg/L 39% of the EPA limit 1300 µg/L Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 100 µg/L 1% of the EPA limit 10000 µg/L Highest in the ZIP: ADC - CUMMINS UNIT MAINT · 3,800 people · 2019 | 1/2 | SYR4 |
| TTHM | 3.06 µg/L 3.8% of the EPA limit 80 µg/L Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019
Highest in the ZIP: 15.34 µg/L — ADC - CUMMINS UNIT MAINT · 3,800 people · 2019 | 2/2 | SYR4 |
| Lithium | 15 µg/L No EPA limit set Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2025 | 2/2 | UCMR-5 |
| Di(2-ethylhexyl) Phthalate | 12.658 µg/L 211% of the EPA limit, at the 95th percentile of samples — 6 µg/L Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019 | 1/2 | SYR4 |
| Lead | 11.5 µg/L 77% of the EPA limit 15 µg/L Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019 | 2/2 | SYR4 |
| Chloroform | 2.954 µg/L No EPA limit set Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019
Highest in the ZIP: 7.322 µg/L — ADC - CUMMINS UNIT MAINT · 3,800 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.9 µg/L 4.8% of the EPA limit 60 µg/L Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019
Highest in the ZIP: 5.3 µg/L — ADC - CUMMINS UNIT MAINT · 3,800 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 5.1 pCi/L No EPA limit set Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 0.6455 µg/L No EPA limit set Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019
Highest in the ZIP: 4.7 µg/L — ADC - CUMMINS UNIT MAINT · 3,800 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 0.1981 µg/L No EPA limit set Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019
Highest in the ZIP: 4.66 µg/L — ADC - CUMMINS UNIT MAINT · 3,800 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 1 µg/L No EPA limit set Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019
Highest in the ZIP: 2.15 µg/L — ADC - CUMMINS UNIT MAINT · 3,800 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 2.1 µg/L No EPA limit set Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2019 | 2/2 | SYR4 |
| Bromoform | 1.3 µg/L No EPA limit set Highest in the ZIP: ADC - CUMMINS UNIT MAINT · 3,800 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.3 µg/L No EPA limit set Highest in the ZIP: ADC - CUMMINS UNIT MAINT · 3,800 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: YORKTOWN WATER ASSOCIATION · 7,364 people · 2025
Highest in the ZIP: 0.0560 mg/L — ADC - CUMMINS UNIT MAINT · 3,800 people · 2025 | 2/2 | 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 71643
| Supplier | State | Population served |
|---|---|---|
| YORKTOWN WATER ASSOCIATION | AR | 7,364 |
| ADC - CUMMINS UNIT MAINT | AR | 3,800 |
Frequently asked questions about ZIP 71643 tap water
Is the tap water in ZIP 71643 safe to drink?
EPA testing detected 17 contaminants across the water suppliers serving ZIP 71643. 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 71643?
2 public water suppliers report EPA drinking-water monitoring for ZIP 71643. Each is listed above with its population served.
What contaminants are in ZIP 71643's water?
EPA monitoring detected Fluoride, Copper, Nitrate-Nitrite, TTHM, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.