Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2015-07-01 → 2015-07-31 |
| MCL | Health-based | Resolved | 2015-07-01 → 2015-07-31 |
| MCL | Health-based | Resolved | 2015-07-01 → 2015-07-31 |
| MCL | Health-based | Resolved | 2015-07-01 → 2015-07-31 |
| RPT | Monitoring | Unaddressed | 2025-07-02 |
| MR | Monitoring | Resolved | 2007-07-01 → 2007-07-31 |
| MR | Monitoring | Resolved | 2007-07-01 → 2007-07-31 |
| MR | Monitoring | Resolved | 2007-07-01 → 2007-07-31 |
| MR | Monitoring | Resolved | 2007-07-01 → 2007-07-31 |
| MR | Monitoring | Resolved | 2003-02-01 → 2003-02-28 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 415 µg/L 32% of the EPA limit 1300 µg/L | 85/90 | SYR4 | 2013–2019 |
| Chloroform | 6.59 µg/L No EPA limit set | 62/62 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 10.4 µg/L No EPA limit set | 59/60 | SYR4 | 2012–2019 |
| TTHM | 13.8 µg/L 17% of the EPA limit 80 µg/L | 48/62 | SYR4 | 2012–2019 |
| Bromodichloromethane | 4.12 µg/L No EPA limit set | 44/62 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 21/21 | LCR | 2025 |
| Dibromochloromethane | 4.02 µg/L No EPA limit set | 14/62 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 1.71 µg/L No EPA limit set | 13/60 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 3.42 µg/L No EPA limit set | 12/60 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 13.3 µg/L 22% of the EPA limit 60 µg/L | 4/60 | SYR4 | 2012–2019 |
| Lithium | 38.6 µg/L No EPA limit set | 4/4 | UCMR-5 | 2024 |
| Bromoform | 2.87 µg/L No EPA limit set | 3/62 | SYR4 | 2012–2019 |
32 contaminants tested, none detected
Utility contact
Frequently asked questions about Grain Valley
Is Grain Valley tap water safe to drink?
EPA monitoring detected 12 contaminants in Grain Valley's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Grain Valley's water?
EPA monitoring detected Copper, Chloroform, Dichloroacetic Acid, TTHM, Bromodichloromethane, and others. The full list with the level and data source for each is above.
How many people does Grain Valley serve?
Grain Valley reports serving 16,000 people in Missouri, per its EPA record.
Has Grain Valley had any water quality violations?
The EPA has 31 violations on file for Grain Valley, of which 4 are health-based (a contaminant limit or required treatment was breached) and 1 remain open. The rest are monitoring or reporting failures.
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.