What was found in Davenport'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 | 3638 µg/L 36% of the EPA limit 10000 µg/L Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 3/5 | SYR4 |
| Copper | 253.8 µg/L 20% of the EPA limit 1300 µg/L Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2018
Highest in the city: 717.4 µg/L — KNOLLCREST HOA · 42 people · 2019 | 3/5 | SYR4 |
| Fluoride | 650 µg/L 16% of the EPA limit 4000 µg/L Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2016 | 2/5 | SYR4 |
| Barium | 602.8 µg/L 30% of the EPA limit 2000 µg/L Highest in the city: KNOLLCREST HOA · 42 people · 2017 | 1/5 | SYR4 |
| TTHM | 64.17 µg/L 80% of the EPA limit 80 µg/L Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Chloroform | 56.75 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 45.47 µg/L 76% of the EPA limit 60 µg/L Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Dichloroacetic Acid | 25.49 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Trichloroacetic Acid | 19.38 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Dibromoacetic Acid | 11.775 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Arsenic | 11.09 µg/L 111% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: MT JOY MOBILE HOME PARK · 140 people · 2019 | 1/5 | SYR4 |
| Lead | 6.3 µg/L 42% of the EPA limit 15 µg/L Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2018
Highest in the city: 9.34 µg/L — KNOLLCREST HOA · 42 people · 2019 | 2/5 | SYR4 |
| Bromodichloromethane | 8.99 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Monochloroacetic Acid | 4.03 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Monobromoacetic Acid | 3.9 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Combined Radium (-226 And -228) | 2 pCi/L 40% of the EPA limit 5 pCi/L Highest in the city: KNOLLCREST HOA · 42 people · 2017 | 2/5 | SYR4 |
| Dibromochloromethane | 1.1 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Atrazine | 0.5900 µg/L 20% of the EPA limit 3 µg/L Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| 2,4-D | 0.2000 µg/L 0.3% of the EPA limit 70 µg/L Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2019 | 1/5 | SYR4 |
| Pfba | 0.0148 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2023 | 1/5 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2024
Highest in the city: 0.0140 mg/L — KNOLLCREST HOA · 42 people · 2025 | 5/5 | LCR |
| PFOA | 0.0041 µg/L No EPA limit set Main supplier: IOWA-AMERICAN WTR CO-DAVENPORT · 147,720 people · 2023 | 1/5 | 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.
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 Davenport
| Supplier | Population served |
|---|---|
| IOWA-AMERICAN WTR CO-DAVENPORT | 147,720 |
| PONDEROSA PARK MHP | 320 |
| MT JOY MOBILE HOME PARK | 140 |
| KNOLLCREST HOA | 42 |
| FASHIONABLE MEADOWS | 40 |
Frequently asked questions about Davenport tap water
Is Davenport tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Davenport. 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 Davenport?
5 public water suppliers report drinking-water monitoring for Davenport, Iowa to the EPA. Each is listed above with its population served.
What contaminants are in Davenport's water?
The contaminants EPA monitoring detected in Davenport include Nitrate, Copper, Fluoride, Barium, TTHM. 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.