What was found in Maquoketa'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 |
|---|---|---|---|
| Fluoride | 800 µg/L 20% of the EPA limit 4000 µg/L Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2013 | 1/1 | SYR4 |
| Copper | 118.25 µg/L 9.1% of the EPA limit 1300 µg/L Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Barium | 63.08 µg/L 3.2% of the EPA limit 2000 µg/L Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2013 | 1/1 | SYR4 |
| Lithium | 25 µg/L No EPA limit set Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2025 | 1/1 | UCMR-5 |
| TTHM | 17.44 µg/L 22% of the EPA limit 80 µg/L Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Lead | 12.425 µg/L 83% of the EPA limit 15 µg/L Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.365 µg/L 16% of the EPA limit 60 µg/L Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 7.166 µg/L No EPA limit set Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 6.5625 µg/L No EPA limit set Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 4.89 µg/L No EPA limit set Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 4.415 pCi/L 88% of the EPA limit 5 pCi/L Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Bromoform | 4.412 µg/L No EPA limit set Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 2.8455 µg/L No EPA limit set Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Chloroform | 2.16 µg/L No EPA limit set Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 1.81 µg/L No EPA limit set Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 0.6250 µg/L No EPA limit set Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0071 mg/L 47% of the EPA limit 0.0150 mg/L Main supplier: MAQUOKETA MUNICIPAL WATER · 6,128 people · 2025 | 1/1 | LCR |
Water suppliers serving Maquoketa
| Supplier | Population served |
|---|---|
| MAQUOKETA MUNICIPAL WATER | 6,128 |
Frequently asked questions about Maquoketa tap water
Is Maquoketa tap water safe to drink?
EPA testing detected 17 contaminants in the water serving Maquoketa. 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 Maquoketa?
1 public water supplier report drinking-water monitoring for Maquoketa, Iowa to the EPA. Each is listed above with its population served.
What contaminants are in Maquoketa's water?
The contaminants EPA monitoring detected in Maquoketa include Fluoride, Copper, Barium, Lithium, 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.