What was found in ZIP 66021
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 | 483.5 µg/L 37% of the EPA limit 1300 µg/L Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2017 | 2/2 | SYR4 |
| TTHM | 57.55 µg/L 72% of the EPA limit 80 µg/L Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019
Highest in the ZIP: 96.8 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 26 µg/L 43% of the EPA limit 60 µg/L Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019
Highest in the ZIP: 68 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2019 | 2/2 | SYR4 |
| Chloroform | 31 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019
Highest in the ZIP: 57.6 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2019 | 2/2 | SYR4 |
| Lithium | 41.1 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2025
Highest in the ZIP: 53.3 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2024 | 2/2 | UCMR-5 |
| Dichloroacetic Acid | 13.8 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019
Highest in the ZIP: 47 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 17 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019
Highest in the ZIP: 29.8 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 11.55 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019
Highest in the ZIP: 18.365 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 7.99 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019
Highest in the ZIP: 14.2 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2019 | 2/2 | SYR4 |
| Lead | 7.35 µg/L 49% of the EPA limit 15 µg/L Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2017 | 2/2 | SYR4 |
| Dibromoacetic Acid | 5.13 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019
Highest in the ZIP: 6.86 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 3.04 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019
Highest in the ZIP: 5.2 µg/L — DOUGLAS CO RWD 4 · 3,000 people · 2019 | 2/2 | SYR4 |
| Bromoform | 4.215 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 2.22 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2019 | 2/2 | SYR4 |
| Pfba | 0.0071 µg/L No EPA limit set Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: JOHNSON CO RWD 7 · 6,457 people · 2023 | 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 66021
| Supplier | State | Population served |
|---|---|---|
| JOHNSON CO RWD 7 | KS | 6,457 |
| DOUGLAS CO RWD 4 | KS | 3,000 |
Frequently asked questions about ZIP 66021 tap water
Is the tap water in ZIP 66021 safe to drink?
EPA testing detected 16 contaminants across the water suppliers serving ZIP 66021. 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 66021?
2 public water suppliers report EPA drinking-water monitoring for ZIP 66021. Each is listed above with its population served.
What contaminants are in ZIP 66021's water?
EPA monitoring detected Copper, TTHM, Total Haloacetic Acids (HAA5), Chloroform, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.