What was found in ZIP 63401
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 | 6268.5 µg/L 63% of the EPA limit 10000 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 6779 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 3/3 | SYR4 |
| Fluoride | 1193 µg/L 30% of the EPA limit 4000 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 3/3 | SYR4 |
| Copper | 254.35 µg/L 20% of the EPA limit 1300 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 642.4 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017 | 3/3 | SYR4 |
| TTHM | 164.5 µg/L 206% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 3/3 | SYR4 |
| Chloroform | 110.25 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 127 µg/L — RALLS COUNTY PWSD 1 · 7,662 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 76.07 µg/L 127% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 79.01 µg/L — RALLS COUNTY PWSD 1 · 7,662 people · 2019 | 2/3 | SYR4 |
| Barium | 72.81 µg/L 3.6% of the EPA limit 2000 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 41.2 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 35.455 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 40.36 µg/L — RALLS COUNTY PWSD 1 · 7,662 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 30.075 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 39.95 µg/L — RALLS COUNTY PWSD 1 · 7,662 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 26.7 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 31.26 µg/L — RALLS COUNTY PWSD 1 · 7,662 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 20.64 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 3/3 | SYR4 |
| Bromoform | 11.275 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 14.41 µg/L — RALLS COUNTY PWSD 1 · 7,662 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 14.395 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 1/3 | SYR4 |
| Lithium | 14.2 µg/L No EPA limit set Highest in the ZIP: RALLS COUNTY PWSD 1 · 7,662 people · 2025 | 1/3 | UCMR-5 |
| Lead | 6.465 µg/L 43% of the EPA limit 15 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 11.315 µg/L — RALLS COUNTY PWSD 1 · 7,662 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 10.026 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 3/3 | SYR4 |
| Chromium | 2.685 µg/L 2.7% of the EPA limit 100 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019
Highest in the ZIP: 3.0075 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017 | 2/3 | SYR4 |
| Atrazine | 2.366 µg/L 79% of the EPA limit 3 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 1/3 | SYR4 |
| Arsenic | 1.06 µg/L 11% of the EPA limit 10 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 1/3 | SYR4 |
| Simazine | 0.3000 µg/L 7.5% of the EPA limit 4 µg/L Main supplier: HANNIBAL PWS · 17,108 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0124 µg/L No EPA limit set Main supplier: HANNIBAL PWS · 17,108 people · 2024
Highest in the ZIP: 0.0701 µg/L — RALLS COUNTY PWSD 1 · 7,662 people · 2025 | 2/3 | UCMR-5 |
| PFBS | 0.0114 µg/L No EPA limit set Highest in the ZIP: RALLS COUNTY PWSD 1 · 7,662 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0053 mg/L 35% of the EPA limit 0.0150 mg/L Main supplier: HANNIBAL PWS · 17,108 people · 2024 | 3/3 | LCR |
| PFOA | 0.0043 µg/L No EPA limit set Highest in the ZIP: RALLS COUNTY PWSD 1 · 7,662 people · 2025 | 1/3 | UCMR-5 |
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 63401
| Supplier | State | Population served |
|---|---|---|
| HANNIBAL PWS | MO | 17,108 |
| RALLS COUNTY PWSD 1 | MO | 7,662 |
| CLARK COUNTY CONS PWSD 1 | MO | 7,140 |
Frequently asked questions about ZIP 63401 tap water
Is the tap water in ZIP 63401 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 63401. 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 63401?
3 public water suppliers report EPA drinking-water monitoring for ZIP 63401. Each is listed above with its population served.
What contaminants are in ZIP 63401's water?
EPA monitoring detected Nitrate-Nitrite, Fluoride, Copper, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.