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Tap water quality report

Grain Valley, MO

EPA monitoring detected 13 contaminants across the 2 water suppliers serving Grain Valley. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
18,530
people served
13
contaminants found
Missouri rankings Lead in Missouri PFAS in Missouri

What was found in Grain Valley'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.

ContaminantLevel vs EPA limitSuppliersSource
Copper
160 µg/L 12%
of the EPA limit 1300 µg/L
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
2/2 SYR4
Lithium
38.6 µg/L
No EPA limit set
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2024
1/2 UCMR-5
Total Haloacetic Acids (HAA5)
13.255 µg/L 22%
of the EPA limit 60 µg/L
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
2/2 SYR4
TTHM
12.59 µg/L 16%
of the EPA limit 80 µg/L
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
2/2 SYR4
Dichloroacetic Acid
8.936 µg/L
No EPA limit set
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
2/2 SYR4
Chloroform
6.336 µg/L
No EPA limit set
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
2/2 SYR4
Dibromochloromethane
3.6755 µg/L
No EPA limit set
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
1/2 SYR4
Bromodichloromethane
3.4925 µg/L
No EPA limit set
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
2/2 SYR4
Bromoform
2.806 µg/L
No EPA limit set
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
1/2 SYR4
Dibromoacetic Acid
2.716 µg/L
No EPA limit set
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
1/2 SYR4
Lead
2.5925 µg/L 17%
of the EPA limit 15 µg/L
Highest in the city: JACKSON COUNTY PWSD 17 · 2,530 people · 2018
1/2 SYR4
Trichloroacetic Acid
1.71 µg/L
No EPA limit set
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: GRAIN VALLEY PWS · 16,000 people · 2025
Highest in the city: 0.0015 mg/L — JACKSON COUNTY PWSD 17 · 2,530 people · 2024
2/2 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 Grain Valley

SupplierPopulation served
GRAIN VALLEY PWS 16,000
JACKSON COUNTY PWSD 17 2,530

Frequently asked questions about Grain Valley tap water

Is Grain Valley tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Grain Valley. 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 Grain Valley?

2 public water suppliers report drinking-water monitoring for Grain Valley, Missouri to the EPA. Each is listed above with its population served.

What contaminants are in Grain Valley's water?

The contaminants EPA monitoring detected in Grain Valley include Copper, Lithium, Total Haloacetic Acids (HAA5), TTHM, Dichloroacetic Acid. 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.