What was found in ZIP 74021
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 |
|---|---|---|---|
| Copper | 1515.75 µg/L 117% of the EPA limit, at the 95th percentile of samples — 1300 µg/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019 | 4/4 | SYR4 |
| Fluoride | 220 µg/L 5.5% of the EPA limit 4000 µg/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2013
Highest in the ZIP: 800 µg/L — COLLINSVILLE · 5,400 people · 2013 | 2/4 | SYR4 |
| Nitrate-Nitrite | 358 µg/L 3.6% of the EPA limit 10000 µg/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019
Highest in the ZIP: 400 µg/L — ROGERS CO RWD # 3 LAKE PLANT · 10,470 people · 2019 | 3/4 | SYR4 |
| TTHM | 90.26999999999998 µg/L 113% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019
Highest in the ZIP: 108 µg/L — ROGERS CO RWD # 3 LAKE PLANT · 10,470 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 61.824999999999996 µg/L 103% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019
Highest in the ZIP: 84.41799999999999 µg/L — COLLINSVILLE · 5,400 people · 2019 | 4/4 | SYR4 |
| Chloroform | 49.43499999999992 µg/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019
Highest in the ZIP: 78.19999999999999 µg/L — ROGERS CO RWD # 3 LAKE PLANT · 10,470 people · 2019 | 4/4 | SYR4 |
| Barium | 47 µg/L 2.4% of the EPA limit 2000 µg/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2013
Highest in the ZIP: 48.5 µg/L — ROGERS CO RWD # 3 LAKE PLANT · 10,470 people · 2013 | 3/4 | SYR4 |
| Dichloroacetic Acid | 28.234999999999992 µg/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019
Highest in the ZIP: 44.16799999999999 µg/L — COLLINSVILLE · 5,400 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 26.025 µg/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019
Highest in the ZIP: 32.24 µg/L — ROGERS CO RWD # 3 LAKE PLANT · 10,470 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 28.15999999999999 µg/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 21.379999999999995 µg/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019 | 4/4 | SYR4 |
| Lead | 8.2 µg/L 55% of the EPA limit 15 µg/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019
Highest in the ZIP: 17.299999999999997 µg/L — COLLINSVILLE · 5,400 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 4.79 µg/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019
Highest in the ZIP: 17.144499999999997 µg/L — COLLINSVILLE · 5,400 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 5.635999999999999 µg/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 5.6 pCi/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2017 | 2/4 | SYR4 |
| Bromoform | 4.139499999999999 µg/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019 | 4/4 | SYR4 |
| Monobromoacetic Acid | 2.57 µg/L No EPA limit set Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019 | 4/4 | SYR4 |
| Combined Radium (-226 And -228) | 0.4690 pCi/L 9.4% of the EPA limit 5 pCi/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2017
Highest in the ZIP: 1.32 pCi/L — COLLINSVILLE · 5,400 people · 2019 | 2/4 | SYR4 |
| Dalapon | 1.2 µg/L 0.6% of the EPA limit 200 µg/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2019 | 1/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.7430 pCi/L 5% of the EPA limit 15 pCi/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2017 | 1/4 | SYR4 |
| Hexachlorocyclopentadiene | 0.0100 µg/L 0% of the EPA limit 50 µg/L Highest in the ZIP: ROGERS CO RWD # 3 LAKE PLANT · 10,470 people · 2019 | 1/4 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: WASHINGTON CO RWD #3 (NEW,#1) · 25,375 people · 2025
Highest in the ZIP: 0.0015 mg/L — ROGERS CO RWD # 3 LAKE PLANT · 10,470 people · 2025 | 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 74021
| Supplier | State | Population served |
|---|---|---|
| WASHINGTON CO RWD #3 (NEW,#1) | OK | 25,375 |
| ROGERS CO RWD # 3 COT STA | OK | 10,750 |
| ROGERS CO RWD # 3 LAKE PLANT | OK | 10,470 |
| COLLINSVILLE | OK | 5,400 |
Frequently asked questions about ZIP 74021 tap water
Is the tap water in ZIP 74021 safe to drink?
EPA testing detected 22 contaminants across the water suppliers serving ZIP 74021. 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 74021?
4 public water suppliers report EPA drinking-water monitoring for ZIP 74021. Each is listed above with its population served.
What contaminants are in ZIP 74021's water?
EPA monitoring detected Copper, Fluoride, Nitrate-Nitrite, TTHM, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.