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Merrill Waterworks

EPA monitoring tested this supplier for 75 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

75
contaminants tested
15
detected
9,661
people served
12
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Lincoln

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

12
health-based violations
234
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2025-10-17
TT Health-based Resolved 2025-10-17
TT Health-based Resolved 2025-10-17
TT Health-based Resolved 2025-10-17
MCL Health-based Resolved 1994-08-01 → 1994-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Fluoride
1078.5 µg/L 27%
of the EPA limit 4000 µg/L
worst single sample: 1120 µg/L
104/200 SYR4 2012–2019
Copper
732 µg/L 56%
of the EPA limit 1300 µg/L
worst single sample: 810 µg/L
40/40 SYR4 2014–2017
Lead
11.2 µg/L 75%
of the EPA limit 15 µg/L
worst single sample: 44 µg/L
37/40 SYR4 2014–2017
Nitrate
3700 µg/L 37%
of the EPA limit 10000 µg/L
 18/46 SYR4 2012–2019
Lead
0.00026 mg/L 1.7%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2023
Chloroform
14.35 µg/L
No EPA limit set
worst single sample: 16 µg/L
12/14 SYR4 2012–2019
Barium
21.3 µg/L 1.1%
of the EPA limit 2000 µg/L
worst single sample: 22 µg/L
8/8 SYR4 2014–2017
Bromodichloromethane
3 µg/L
No EPA limit set
worst single sample: 3.3 µg/L
7/14 SYR4 2012–2019
TTHM
14.45 µg/L 18%
of the EPA limit 80 µg/L
worst single sample: 15 µg/L
6/6 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
7.675 µg/L 13%
of the EPA limit 60 µg/L
worst single sample: 7.9 µg/L
6/6 SYR4 2014–2019
Trichloroacetic Acid
4.475 µg/L
No EPA limit set
worst single sample: 4.5 µg/L
6/6 SYR4 2014–2019
Dichloroacetic Acid
3.3 µg/L
No EPA limit set
worst single sample: 3.5 µg/L
5/6 SYR4 2014–2019
Combined Radium (-226 And -228)
2.0955 pCi/L 42%
of the EPA limit 5 pCi/L
worst single sample: 2.28 pCi/L
4/4 SYR4 2014–2017
Nitrate-Nitrite
3076 µg/L 31%
of the EPA limit 10000 µg/L
worst single sample: 3400 µg/L
3/8 SYR4 2014–2017
Arsenic
1.9 µg/L 19%
of the EPA limit 10 µg/L
 1/8 SYR4 2014–2017
60 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Merrill Waterworks

Is Merrill Waterworks tap water safe to drink?

EPA monitoring detected 15 contaminants in Merrill Waterworks's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Merrill Waterworks's water?

EPA monitoring detected Fluoride, Copper, Lead, Nitrate, Lead, and others. The full list with the level and data source for each is above.

How many people does Merrill Waterworks serve?

Merrill Waterworks reports serving 9,661 people in Wisconsin, per its EPA record.

Has Merrill Waterworks had any water quality violations?

The EPA has 234 violations on file for Merrill Waterworks, of which 12 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.