What was found in Coralville's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 1200 µg/L 12% of the EPA limit 10000 µg/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019
Highest in the city: 1500 µg/L — NORTH CORALVILLE LAKE MANOR · 55 people · 2019 | 2/4 | SYR4 |
| Fluoride | 780 µg/L 20% of the EPA limit 4000 µg/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2012 | 4/4 | SYR4 |
| Copper | 180 µg/L 14% of the EPA limit 1300 µg/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2018
Highest in the city: 493 µg/L — WESTERN HILLS (MOBILE) ESTATES · 760 people · 2018 | 4/4 | SYR4 |
| Lithium | 390 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2023 | 1/4 | UCMR-5 |
| Barium | 100 µg/L 5% of the EPA limit 2000 µg/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2012
Highest in the city: 110 µg/L — NORTH CORALVILLE LAKE MANOR · 55 people · 2014 | 3/4 | SYR4 |
| TTHM | 60 µg/L 75% of the EPA limit 80 µg/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 3/4 | SYR4 |
| Dibromochloromethane | 22 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 2/4 | SYR4 |
| Lead | 10 µg/L 67% of the EPA limit 15 µg/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2018
Highest in the city: 18.1 µg/L — WESTERN HILLS (MOBILE) ESTATES · 760 people · 2018 | 4/4 | SYR4 |
| Bromodichloromethane | 15.75 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 2/4 | SYR4 |
| Bromoform | 13 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 2/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.1 µg/L 15% of the EPA limit 60 µg/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 1/4 | SYR4 |
| Chloroform | 8.3 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 3/4 | SYR4 |
| Dibromoacetic Acid | 4 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 1/4 | SYR4 |
| Monochloroacetic Acid | 2.95 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 1 pCi/L 20% of the EPA limit 5 pCi/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2018
Highest in the city: 2.52 pCi/L — RIVER HEIGHTS PROPERTY OWNERS ASSOC. · 390 people · 2018 | 3/4 | SYR4 |
| Dichloroacetic Acid | 2 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 2/4 | SYR4 |
| Monobromoacetic Acid | 1.95 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 1/4 | SYR4 |
| Toluene | 1.93 µg/L 0.2% of the EPA limit 1000 µg/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2017 | 1/4 | SYR4 |
| Xylenes, Total | 1.9 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: WESTERN HILLS (MOBILE) ESTATES · 760 people · 2019 | 1/4 | SYR4 |
| Trichloroacetic Acid | 1.8 µg/L No EPA limit set Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2019 | 2/4 | SYR4 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: CORALVILLE MUNI WATER SYSTEM · 22,318 people · 2024
Highest in the city: 0.0140 mg/L — NORTH CORALVILLE LAKE MANOR · 55 people · 2024 | 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Coralville
| Supplier | Population served |
|---|---|
| CORALVILLE MUNI WATER SYSTEM | 22,318 |
| WESTERN HILLS (MOBILE) ESTATES | 760 |
| RIVER HEIGHTS PROPERTY OWNERS ASSOC. | 390 |
| NORTH CORALVILLE LAKE MANOR | 55 |
Frequently asked questions about Coralville tap water
Is Coralville tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Coralville. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Coralville?
4 public water suppliers report drinking-water monitoring for Coralville, Iowa to the EPA. Each is listed above with its population served.
What contaminants are in Coralville's water?
The contaminants EPA monitoring detected in Coralville include Nitrate, Fluoride, Copper, Lithium, Barium. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.