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Tap water quality report

Dearborn, MO

EPA monitoring detected 10 contaminants across the 2 water suppliers serving Dearborn. 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
2,530
people served
10
contaminants found
Missouri rankings Lead in Missouri PFAS in Missouri

What was found in Dearborn'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
Total Haloacetic Acids (HAA5)
21.375 µg/L 36%
of the EPA limit 60 µg/L
Main supplier: PLATTE CO PWSD 9 · 1,860 people · 2019
Highest in the city: 27.62 µg/L — DEARBORN PWS · 670 people · 2019
2/2 SYR4
Dichloroacetic Acid
18.33 µg/L
No EPA limit set
Main supplier: PLATTE CO PWSD 9 · 1,860 people · 2019
Highest in the city: 25.51 µg/L — DEARBORN PWS · 670 people · 2019
2/2 SYR4
TTHM
11.16 µg/L 14%
of the EPA limit 80 µg/L
Main supplier: PLATTE CO PWSD 9 · 1,860 people · 2019
Highest in the city: 15.3 µg/L — DEARBORN PWS · 670 people · 2019
2/2 SYR4
Chloroform
10.26 µg/L
No EPA limit set
Main supplier: PLATTE CO PWSD 9 · 1,860 people · 2019
Highest in the city: 13.865 µg/L — DEARBORN PWS · 670 people · 2019
2/2 SYR4
Monochloroacetic Acid
8.85 µg/L
No EPA limit set
Highest in the city: DEARBORN PWS · 670 people · 2019
1/2 SYR4
Copper
4.934 µg/L 0.4%
of the EPA limit 1300 µg/L
Main supplier: PLATTE CO PWSD 9 · 1,860 people · 2017
Highest in the city: 4.9675 µg/L — DEARBORN PWS · 670 people · 2019
2/2 SYR4
Lead
4.27 µg/L 28%
of the EPA limit 15 µg/L
Main supplier: PLATTE CO PWSD 9 · 1,860 people · 2017
2/2 SYR4
Trichloroacetic Acid
2.6535 µg/L
No EPA limit set
Main supplier: PLATTE CO PWSD 9 · 1,860 people · 2019
2/2 SYR4
Bromodichloromethane
1.182 µg/L
No EPA limit set
Main supplier: PLATTE CO PWSD 9 · 1,860 people · 2019
Highest in the city: 1.378 µg/L — DEARBORN PWS · 670 people · 2019
2/2 SYR4
Lead
0.0075 mg/L 50%
of the EPA limit 0.0150 mg/L
Main supplier: PLATTE CO PWSD 9 · 1,860 people · 2023
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 Dearborn

SupplierPopulation served
PLATTE CO PWSD 9 1,860
DEARBORN PWS 670

Frequently asked questions about Dearborn tap water

Is Dearborn tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Dearborn. 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 Dearborn?

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

What contaminants are in Dearborn's water?

The contaminants EPA monitoring detected in Dearborn include Total Haloacetic Acids (HAA5), Dichloroacetic Acid, TTHM, Chloroform, Monochloroacetic 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.