What was found in ZIP 62521
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 | 7900 µg/L 79% of the EPA limit 10000 µg/L Main supplier: DECATUR · 76,122 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 6619 µg/L 66% of the EPA limit 10000 µg/L Main supplier: DECATUR · 76,122 people · 2018 | 1/3 | SYR4 |
| Fluoride | 1133.5 µg/L 28% of the EPA limit 4000 µg/L Main supplier: DECATUR · 76,122 people · 2019 | 2/3 | SYR4 |
| Chlorite | 482.5 µg/L 48% of the EPA limit 1000 µg/L Main supplier: DECATUR · 76,122 people · 2019 | 1/3 | SYR4 |
| Barium | 20.4 µg/L 1% of the EPA limit 2000 µg/L Main supplier: DECATUR · 76,122 people · 2019
Highest in the ZIP: 370.2 µg/L — LONG CREEK TOWNSHIP PWS · 7,850 people · 2017 | 2/3 | SYR4 |
| Copper | 45.975 µg/L 3.5% of the EPA limit 1300 µg/L Main supplier: DECATUR · 76,122 people · 2017
Highest in the ZIP: 330 µg/L — LONG CREEK TOWNSHIP PWS · 7,850 people · 2019 | 2/3 | SYR4 |
| TTHM | 76.725 µg/L 96% of the EPA limit 80 µg/L Main supplier: DECATUR · 76,122 people · 2019
Highest in the ZIP: 79.9 µg/L — MOUNT ZION · 5,833 people · 2019 | 3/3 | SYR4 |
| Chloroform | 60.844 µg/L No EPA limit set Main supplier: DECATUR · 76,122 people · 2019
Highest in the ZIP: 62.6 µg/L — MOUNT ZION · 5,833 people · 2019 | 3/3 | SYR4 |
| Lead | 7.2 µg/L 48% of the EPA limit 15 µg/L Main supplier: DECATUR · 76,122 people · 2017
Highest in the ZIP: 60.635 µg/L — MOUNT ZION · 5,833 people · 2019 | 3/3 | SYR4 |
| Arsenic | 1.58 µg/L 16% of the EPA limit 10 µg/L Main supplier: DECATUR · 76,122 people · 2019
Highest in the ZIP: 24.755 µg/L — LONG CREEK TOWNSHIP PWS · 7,850 people · 2017 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 19.91 µg/L 33% of the EPA limit 60 µg/L Main supplier: DECATUR · 76,122 people · 2019
Highest in the ZIP: 20 µg/L — MOUNT ZION · 5,833 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 15.3 µg/L No EPA limit set Main supplier: DECATUR · 76,122 people · 2019
Highest in the ZIP: 16.2 µg/L — MOUNT ZION · 5,833 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 13.1715 µg/L No EPA limit set Main supplier: DECATUR · 76,122 people · 2019
Highest in the ZIP: 13.8 µg/L — MOUNT ZION · 5,833 people · 2019 | 3/3 | SYR4 |
| Selenium | 6.5 µg/L 13% of the EPA limit 50 µg/L Main supplier: DECATUR · 76,122 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 5.996 µg/L No EPA limit set Main supplier: DECATUR · 76,122 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 5.8155 µg/L No EPA limit set Main supplier: DECATUR · 76,122 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 4.2275 µg/L No EPA limit set Main supplier: DECATUR · 76,122 people · 2019
Highest in the ZIP: 4.67 µg/L — LONG CREEK TOWNSHIP PWS · 7,850 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 4.527 µg/L No EPA limit set Main supplier: DECATUR · 76,122 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.155 µg/L No EPA limit set Main supplier: DECATUR · 76,122 people · 2019 | 3/3 | SYR4 |
| Bromoform | 1.88468 µg/L No EPA limit set Main supplier: DECATUR · 76,122 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.8464 pCi/L 17% of the EPA limit 5 pCi/L Highest in the ZIP: LONG CREEK TOWNSHIP PWS · 7,850 people · 2016 | 1/3 | SYR4 |
| Toluene | 0.5200 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the ZIP: LONG CREEK TOWNSHIP PWS · 7,850 people · 2016 | 1/3 | SYR4 |
| Atrazine | 0.4000 µg/L 13% of the EPA limit 3 µg/L Main supplier: DECATUR · 76,122 people · 2019 | 1/3 | SYR4 |
| Pfpea | 0.0034 µg/L No EPA limit set Highest in the ZIP: MOUNT ZION · 5,833 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0026 mg/L 17% of the EPA limit 0.0150 mg/L Main supplier: DECATUR · 76,122 people · 2025
Highest in the ZIP: 0.0028 mg/L — LONG CREEK TOWNSHIP PWS · 7,850 people · 2025 | 3/3 | 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 62521
| Supplier | State | Population served |
|---|---|---|
| DECATUR | IL | 76,122 |
| LONG CREEK TOWNSHIP PWS | IL | 7,850 |
| MOUNT ZION | IL | 5,833 |
Frequently asked questions about ZIP 62521 tap water
Is the tap water in ZIP 62521 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 62521. 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 62521?
3 public water suppliers report EPA drinking-water monitoring for ZIP 62521. Each is listed above with its population served.
What contaminants are in ZIP 62521's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Chlorite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.