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Tap water quality report

Le Mars, IA

EPA monitoring detected 18 contaminants across the 1 water supplier serving Le Mars. 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.

1
water supplier
10,606
people served
18
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Le Mars'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
1001.9999999999999 µg/L 77%
of the EPA limit 1300 µg/L
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2018
1/1 SYR4
Nitrate
900 µg/L 9%
of the EPA limit 10000 µg/L
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2013
1/1 SYR4
Lithium
92 µg/L
No EPA limit set
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2024
1/1 UCMR-5
TTHM
59.89999999999996 µg/L 75%
of the EPA limit 80 µg/L
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Dibromochloromethane
24.599999999999987 µg/L
No EPA limit set
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Bromodichloromethane
16.99999999999999 µg/L
No EPA limit set
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
16.45 µg/L 27%
of the EPA limit 60 µg/L
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Monochloroacetic Acid
12.236999999999998 µg/L
No EPA limit set
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Bromoform
11.799999999999994 µg/L
No EPA limit set
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Lead
9.439999999999992 µg/L 63%
of the EPA limit 15 µg/L
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2018
1/1 SYR4
Chloroform
7.2199999999999935 µg/L
No EPA limit set
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Dibromoacetic Acid
4.299999999999999 µg/L
No EPA limit set
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Dichloroacetic Acid
3 µg/L
No EPA limit set
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Dichloromethane
2.3 µg/L 46%
of the EPA limit 5 µg/L
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2018
1/1 SYR4
Combined Radium (-226 And -228)
2.1 pCi/L 42%
of the EPA limit 5 pCi/L
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2015
1/1 SYR4
Trichloroacetic Acid
1.2209999999999999 µg/L
No EPA limit set
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2019
1/1 SYR4
Lead
0.0022 mg/L 15%
of the EPA limit 0.0150 mg/L
Main supplier: LEMARS WATER DEPARTMENT · 10,606 people · 2024
1/1 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 Le Mars

SupplierPopulation served
LEMARS WATER DEPARTMENT 10,606

Frequently asked questions about Le Mars tap water

Is Le Mars tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Le Mars. 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 Le Mars?

1 public water supplier report drinking-water monitoring for Le Mars, Iowa to the EPA. Each is listed above with its population served.

What contaminants are in Le Mars's water?

The contaminants EPA monitoring detected in Le Mars include Copper, Nitrate, Fluoride, Lithium, TTHM. 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.