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Tap water quality report

Merrill, WI

EPA monitoring detected 18 contaminants across the 3 water suppliers serving Merrill. 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.

3
water suppliers
9,880
people served
18
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Merrill'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
Nitrate-Nitrite
3076 µg/L 31%
of the EPA limit 10000 µg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2017
Highest in the city: 8275 µg/L — DEER RUN MOBILE HOME COMMUNITY · 49 people · 2015
3/3 SYR4
Nitrate
3700 µg/L 37%
of the EPA limit 10000 µg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2019
Highest in the city: 7762 µg/L — DEER RUN MOBILE HOME COMMUNITY · 49 people · 2019
3/3 SYR4
Fluoride
1078.5 µg/L 27%
of the EPA limit 4000 µg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2019
2/3 SYR4
Copper
732 µg/L 56%
of the EPA limit 1300 µg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2017
3/3 SYR4
Lead
11.2 µg/L 75%
of the EPA limit 15 µg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2017
Highest in the city: 23.24 µg/L — DEER RUN MOBILE HOME COMMUNITY · 49 people · 2019
3/3 SYR4
Barium
21.3 µg/L 1.1%
of the EPA limit 2000 µg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2017
3/3 SYR4
TTHM
14.45 µg/L 18%
of the EPA limit 80 µg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2019
2/3 SYR4
Chloroform
14.35 µg/L
No EPA limit set
Main supplier: MERRILL WATERWORKS · 9,661 people · 2019
1/3 SYR4
Total Haloacetic Acids (HAA5)
7.675 µg/L 13%
of the EPA limit 60 µg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2019
2/3 SYR4
Trichloroacetic Acid
4.475 µg/L
No EPA limit set
Main supplier: MERRILL WATERWORKS · 9,661 people · 2019
1/3 SYR4
Dichloroacetic Acid
3.3 µg/L
No EPA limit set
Main supplier: MERRILL WATERWORKS · 9,661 people · 2019
2/3 SYR4
Bromodichloromethane
3 µg/L
No EPA limit set
Main supplier: MERRILL WATERWORKS · 9,661 people · 2019
1/3 SYR4
Combined Radium (-226 And -228)
2.0955 pCi/L 42%
of the EPA limit 5 pCi/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2017
3/3 SYR4
Arsenic
1.9 µg/L 19%
of the EPA limit 10 µg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2017
2/3 SYR4
Chromium
1.195 µg/L 1.2%
of the EPA limit 100 µg/L
Highest in the city: DEER RUN MOBILE HOME COMMUNITY · 49 people · 2018
1/3 SYR4
Gross Alpha, Excl. Radon And U
1.05247 pCi/L 7%
of the EPA limit 15 pCi/L
Highest in the city: LITTLE FLORIDA · 170 people · 2018
1/3 SYR4
Combined Uranium
0.3770 µg/L 1.3%
of the EPA limit 30 µg/L
Highest in the city: LITTLE FLORIDA · 170 people · 2018
1/3 SYR4
Lead
0.00026 mg/L 1.7%
of the EPA limit 0.0150 mg/L
Main supplier: MERRILL WATERWORKS · 9,661 people · 2023
Highest in the city: 0.0098 mg/L — DEER RUN MOBILE HOME COMMUNITY · 49 people · 2024
3/3 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 Merrill

SupplierPopulation served
MERRILL WATERWORKS 9,661
LITTLE FLORIDA 170
DEER RUN MOBILE HOME COMMUNITY 49

Frequently asked questions about Merrill tap water

Is Merrill tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Merrill. 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 Merrill?

3 public water suppliers report drinking-water monitoring for Merrill, Wisconsin to the EPA. Each is listed above with its population served.

What contaminants are in Merrill's water?

The contaminants EPA monitoring detected in Merrill include Nitrate-Nitrite, Nitrate, Fluoride, Copper, Lead. 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.