What was found in ZIP 62305
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 | 4500 µg/L 45% of the EPA limit 10000 µg/L Main supplier: QUINCY · 42,000 people · 2019
Highest in the ZIP: 9100 µg/L — MILL CREEK PWD · 5,755 people · 2019 | 2/4 | SYR4 |
| Nitrate-Nitrite | 2610 µg/L 26% of the EPA limit 10000 µg/L Main supplier: QUINCY · 42,000 people · 2018
Highest in the ZIP: 8315 µg/L — MILL CREEK PWD · 5,755 people · 2018 | 3/4 | SYR4 |
| Copper | 62.7 µg/L 4.8% of the EPA limit 1300 µg/L Main supplier: QUINCY · 42,000 people · 2017
Highest in the ZIP: 2350 µg/L — ABS WATER COOP · 6,858 people · 2019 | 4/4 | SYR4 |
| Fluoride | 991.6 µg/L 25% of the EPA limit 4000 µg/L Main supplier: QUINCY · 42,000 people · 2019
Highest in the ZIP: 1175 µg/L — MILL CREEK PWD · 5,755 people · 2018 | 3/4 | SYR4 |
| Barium | 21.8 µg/L 1.1% of the EPA limit 2000 µg/L Main supplier: QUINCY · 42,000 people · 2019
Highest in the ZIP: 127 µg/L — MILL CREEK PWD · 5,755 people · 2018 | 3/4 | SYR4 |
| TTHM | 77.28 µg/L 97% of the EPA limit 80 µg/L Main supplier: QUINCY · 42,000 people · 2019 | 4/4 | SYR4 |
| Chloroform | 70.185 µg/L No EPA limit set Main supplier: QUINCY · 42,000 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 41.585 µg/L 69% of the EPA limit 60 µg/L Main supplier: QUINCY · 42,000 people · 2019 | 3/4 | SYR4 |
| Lead | 34.15 µg/L 228% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: QUINCY · 42,000 people · 2017
Highest in the ZIP: 37.59 µg/L — ABS WATER COOP · 6,858 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 31.03 µg/L No EPA limit set Main supplier: QUINCY · 42,000 people · 2019 | 3/4 | SYR4 |
| Lithium | 20 µg/L No EPA limit set Highest in the ZIP: MILL CREEK PWD · 5,755 people · 2023 | 1/4 | UCMR-5 |
| Monobromoacetic Acid | 13.66 µg/L No EPA limit set Main supplier: QUINCY · 42,000 people · 2019 | 2/4 | SYR4 |
| Trichloroacetic Acid | 13.455 µg/L No EPA limit set Main supplier: QUINCY · 42,000 people · 2019 | 3/4 | SYR4 |
| Dibromochloromethane | 2.509 µg/L No EPA limit set Main supplier: QUINCY · 42,000 people · 2019
Highest in the ZIP: 10.425 µg/L — ABS WATER COOP · 6,858 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 9.0015 µg/L No EPA limit set Main supplier: QUINCY · 42,000 people · 2019
Highest in the ZIP: 9.14 µg/L — ABS WATER COOP · 6,858 people · 2019 | 4/4 | SYR4 |
| Selenium | 3.2 µg/L 6.4% of the EPA limit 50 µg/L Main supplier: QUINCY · 42,000 people · 2019
Highest in the ZIP: 5.325 µg/L — MILL CREEK PWD · 5,755 people · 2018 | 2/4 | SYR4 |
| Chromium | 5.1 µg/L 5.1% of the EPA limit 100 µg/L Highest in the ZIP: MILL CREEK PWD · 5,755 people · 2018 | 2/4 | SYR4 |
| Monochloroacetic Acid | 4.5935 µg/L No EPA limit set Main supplier: QUINCY · 42,000 people · 2019 | 1/4 | SYR4 |
| Dibromoacetic Acid | 4.43 µg/L No EPA limit set Highest in the ZIP: ABS WATER COOP · 6,858 people · 2019 | 3/4 | SYR4 |
| Bromoform | 4.215 µg/L No EPA limit set Highest in the ZIP: MILL CREEK PWD · 5,755 people · 2019 | 3/4 | SYR4 |
| Arsenic | 1.3 µg/L 13% of the EPA limit 10 µg/L Main supplier: QUINCY · 42,000 people · 2019 | 2/4 | SYR4 |
| Toluene | 1.1705 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: QUINCY · 42,000 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 0.3080 pCi/L 6.2% of the EPA limit 5 pCi/L Highest in the ZIP: MILL CREEK PWD · 5,755 people · 2015 | 1/4 | SYR4 |
| Pfba | 0.0135 µg/L No EPA limit set Main supplier: QUINCY · 42,000 people · 2025 | 1/4 | UCMR-5 |
| PFBS | 0.0057 µg/L No EPA limit set Main supplier: QUINCY · 42,000 people · 2025 | 1/4 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: QUINCY · 42,000 people · 2025
Highest in the ZIP: 0.0022 mg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2023 | 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 62305
| Supplier | State | Population served |
|---|---|---|
| QUINCY | IL | 42,000 |
| CLARK COUNTY CONS PWSD 1 | MO | 7,140 |
| ABS WATER COOP | IL | 6,858 |
| MILL CREEK PWD | IL | 5,755 |
Frequently asked questions about ZIP 62305 tap water
Is the tap water in ZIP 62305 safe to drink?
EPA testing detected 26 contaminants across the water suppliers serving ZIP 62305. 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 62305?
4 public water suppliers report EPA drinking-water monitoring for ZIP 62305. Each is listed above with its population served.
What contaminants are in ZIP 62305's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Copper, Fluoride, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.