Tap WaterIndex

← Missouri

Tap water quality report

Dekalb, MO

EPA monitoring detected 19 contaminants across the 2 water suppliers serving Dekalb. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
89,421
people served
19
contaminants found
Missouri rankings Lead in Missouri PFAS in Missouri

What was found in Dekalb's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
770 µg/L 19%
of the EPA limit 4000 µg/L
 1/2 SYR4
Nitrate
680 µg/L 6.8%
of the EPA limit 10000 µg/L
 1/2 SYR4
Nitrate-Nitrite
680 µg/L 6.8%
of the EPA limit 10000 µg/L
 1/2 SYR4
Copper
362 µg/L 28%
of the EPA limit 1300 µg/L
 2/2 SYR4
Lithium
114 µg/L
No EPA limit set
 1/2 UCMR-5
Barium
100 µg/L 5%
of the EPA limit 2000 µg/L
 1/2 SYR4
TTHM
60.8 µg/L 76%
of the EPA limit 80 µg/L
 2/2 SYR4
Chloroform
37.3 µg/L
No EPA limit set
 2/2 SYR4
Total Haloacetic Acids (HAA5)
32.4 µg/L 54%
of the EPA limit 60 µg/L
 1/2 SYR4
Dichloroacetic Acid
17.9 µg/L
No EPA limit set
 2/2 SYR4
Lead
17.6 µg/L 117%
of the EPA limit, in the worst sample — 15 µg/L
 2/2 SYR4
Bromodichloromethane
15.6 µg/L
No EPA limit set
 2/2 SYR4
Trichloroacetic Acid
11.3 µg/L
No EPA limit set
 2/2 SYR4
Dibromochloromethane
7.2 µg/L
No EPA limit set
 2/2 SYR4
Monobromoacetic Acid
2.5 µg/L
No EPA limit set
 1/2 SYR4
Dibromoacetic Acid
2.1 µg/L
No EPA limit set
 1/2 SYR4
Chromium
1.1 µg/L 1.1%
of the EPA limit 100 µg/L
 1/2 SYR4
Bromoform
0.7000 µg/L
No EPA limit set
 1/2 SYR4
Lead
0.0066 mg/L 44%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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 Dekalb

SupplierPopulation served
MO AMERICAN ST JOSEPH 89,171
DEKALB PWS 250

Frequently asked questions about Dekalb tap water

Is Dekalb tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Dekalb. 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 Dekalb?

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

What contaminants are in Dekalb's water?

The contaminants EPA monitoring detected in Dekalb include Fluoride, Nitrate, Nitrate-Nitrite, Copper, Lithium. The full list, with the highest level found 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.