What was found in North Liberty'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 | 1400 µg/L 14% of the EPA limit 10000 µg/L Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2019
Highest in the city: 6800 µg/L — CORALVILLE LAKE TERRACE · 340 people · 2019 | 3/4 | SYR4 |
| Fluoride | 1397 µg/L 35% of the EPA limit 4000 µg/L Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2015 | 4/4 | SYR4 |
| Copper | 778 µg/L 60% of the EPA limit 1300 µg/L Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2019 | 4/4 | SYR4 |
| Barium | 149 µg/L 7.5% of the EPA limit 2000 µg/L Highest in the city: CORALVILLE LAKE TERRACE · 340 people · 2015 | 2/4 | SYR4 |
| Lithium | 78 µg/L No EPA limit set Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2023 | 1/4 | UCMR-5 |
| Lead | 8.7 µg/L 58% of the EPA limit 15 µg/L Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2019
Highest in the city: 28.4 µg/L — LONGVIEW ESTATES HOA (NORTH LIBERTY) · 108 people · 2018 | 4/4 | SYR4 |
| TTHM | 6.41 µg/L 8% of the EPA limit 80 µg/L Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2019 | 1/4 | SYR4 |
| Arsenic | 4.9 µg/L 49% of the EPA limit 10 µg/L Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2015 | 1/4 | SYR4 |
| Dibromochloromethane | 2.785 µg/L No EPA limit set Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2019 | 1/4 | SYR4 |
| Bromoform | 2.57 µg/L No EPA limit set Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 2.06 pCi/L 41% of the EPA limit 5 pCi/L Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2018 | 3/4 | SYR4 |
| Xylenes, Total | 1.455 µg/L 0% of the EPA limit 10000 µg/L Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2018 | 1/4 | SYR4 |
| Bromodichloromethane | 1.4 µg/L No EPA limit set Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2019 | 1/4 | SYR4 |
| Dibromoacetic Acid | 1 µg/L No EPA limit set Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2019 | 1/4 | SYR4 |
| Chloroform | 0.9800 µg/L No EPA limit set Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2019 | 1/4 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: NORTH LIBERTY WATER SUPPLY · 23,276 people · 2025
Highest in the city: 0.0030 mg/L — CORALVILLE LAKE TERRACE · 340 people · 2024 | 4/4 | LCR |
Water suppliers serving North Liberty
| Supplier | Population served |
|---|---|
| NORTH LIBERTY WATER SUPPLY | 23,276 |
| CORALVILLE LAKE TERRACE | 340 |
| LONGVIEW ESTATES HOA (NORTH LIBERTY) | 108 |
| CUMBERLAND RIDGE FIRST ADDITION | 55 |
Frequently asked questions about North Liberty tap water
Is North Liberty tap water safe to drink?
EPA testing detected 16 contaminants in the water serving North Liberty. 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 North Liberty?
4 public water suppliers report drinking-water monitoring for North Liberty, Iowa to the EPA. Each is listed above with its population served.
What contaminants are in North Liberty's water?
The contaminants EPA monitoring detected in North Liberty include Nitrate, Fluoride, Copper, Barium, Lithium. 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.