What was found in Grimes'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 | 1725 µg/L 43% of the EPA limit 4000 µg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019 | 1/4 | SYR4 |
| Copper | 324.25 µg/L 25% of the EPA limit 1300 µg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019 | 2/4 | SYR4 |
| Nitrate | 259 µg/L 2.6% of the EPA limit 10000 µg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019 | 1/4 | SYR4 |
| TTHM | 52 µg/L 65% of the EPA limit 80 µg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019
Highest in the city: 65.425 µg/L — PARK VIEW VILLAGE · 1,800 people · 2019 | 2/4 | SYR4 |
| Barium | 47.42 µg/L 2.4% of the EPA limit 2000 µg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019 | 1/4 | SYR4 |
| Chloroform | 32.5 µg/L No EPA limit set Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019
Highest in the city: 42.55 µg/L — PARK VIEW VILLAGE · 1,800 people · 2019 | 2/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 22.5 µg/L 38% of the EPA limit 60 µg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019
Highest in the city: 35.435 µg/L — PARK VIEW VILLAGE · 1,800 people · 2019 | 2/4 | SYR4 |
| Lithium | 22 µg/L No EPA limit set Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2025 | 1/4 | UCMR-5 |
| Dichloroacetic Acid | 11.9 µg/L No EPA limit set Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019
Highest in the city: 17.6 µg/L — PARK VIEW VILLAGE · 1,800 people · 2019 | 2/4 | SYR4 |
| Bromodichloromethane | 14 µg/L No EPA limit set Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019
Highest in the city: 16.95 µg/L — PARK VIEW VILLAGE · 1,800 people · 2019 | 2/4 | SYR4 |
| Monochloroacetic Acid | 2 µg/L No EPA limit set Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019
Highest in the city: 15.8 µg/L — PARK VIEW VILLAGE · 1,800 people · 2019 | 2/4 | SYR4 |
| Lead | 12.33 µg/L 82% of the EPA limit 15 µg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019 | 2/4 | SYR4 |
| Trichloroacetic Acid | 8.25 µg/L No EPA limit set Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019 | 2/4 | SYR4 |
| Dibromochloromethane | 4.94 µg/L No EPA limit set Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019
Highest in the city: 7.7895 µg/L — PARK VIEW VILLAGE · 1,800 people · 2019 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 4.47 pCi/L 89% of the EPA limit 5 pCi/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019 | 1/4 | SYR4 |
| Arsenic | 3.57 µg/L 36% of the EPA limit 10 µg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019 | 1/4 | SYR4 |
| Dibromoacetic Acid | 2 µg/L No EPA limit set Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2019
Highest in the city: 2.899 µg/L — PARK VIEW VILLAGE · 1,800 people · 2019 | 2/4 | SYR4 |
| Bromoform | 1.4865 µg/L No EPA limit set Highest in the city: PARK VIEW VILLAGE · 1,800 people · 2019 | 1/4 | SYR4 |
| Dalapon | 0.6000 µg/L 0.3% of the EPA limit 200 µg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2017 | 1/4 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: GRIMES WATER SUPPLY · 17,809 people · 2023 | 3/4 | 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 Grimes
| Supplier | Population served |
|---|---|
| GRIMES WATER SUPPLY | 17,809 |
| PARK VIEW VILLAGE | 1,800 |
| GRIMES MHP MHC | 163 |
| CIWW (GRIMES) | 25 |
Frequently asked questions about Grimes tap water
Is Grimes tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Grimes. 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 Grimes?
4 public water suppliers report drinking-water monitoring for Grimes, Iowa to the EPA. Each is listed above with its population served.
What contaminants are in Grimes's water?
The contaminants EPA monitoring detected in Grimes include Fluoride, Copper, Nitrate, TTHM, 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.