Is Berlin Waterworks Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Green Lake

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Fluoride	1299 µg/L 32% of the EPA limit 4000 µg/L worst single sample: 1500 µg/L	102/198	SYR4	2012–2019
Copper	681.5 µg/L 52% of the EPA limit 1300 µg/L worst single sample: 970 µg/L	40/40	SYR4	2014–2017
Lead	16.35 µg/L 109% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 66 µg/L	38/40	SYR4	2014–2017
Nitrate	4075 µg/L 41% of the EPA limit 10000 µg/L worst single sample: 4300 µg/L	24/36	SYR4	2012–2019
Combined Radium (-226 And -228)	5.7 pCi/L 114% of the EPA limit, at the 95th percentile of samples — 5 pCi/L worst single sample: 8.31 pCi/L	19/19	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	12.33 pCi/L 82% of the EPA limit 15 pCi/L worst single sample: 14.2 pCi/L	18/18	SYR4	2012–2019
Lead	0.00055 mg/L 3.7% of the EPA limit 0.0150 mg/L	16/16	LCR	2023
Dibromochloromethane	4.45 µg/L No EPA limit set worst single sample: 5.1 µg/L	11/14	SYR4	2012–2019
Bromodichloromethane	6.15 µg/L No EPA limit set worst single sample: 7.5 µg/L	10/14	SYR4	2012–2019
Gross Beta Particle Activity	4.518 pCi/L No EPA limit set worst single sample: 5.29 pCi/L	9/9	SYR4	2012–2013
Bromoform	1.265 µg/L No EPA limit set worst single sample: 1.3 µg/L	8/12	SYR4	2012–2019
Chloroform	6.265 µg/L No EPA limit set worst single sample: 7.7 µg/L	8/11	SYR4	2012–2019
Barium	64.5 µg/L 3.2% of the EPA limit 2000 µg/L worst single sample: 65 µg/L	6/6	SYR4	2014–2017
Dibromoacetic Acid	1.075 µg/L No EPA limit set worst single sample: 1.1 µg/L	6/6	SYR4	2014–2019
TTHM	19.195 µg/L 24% of the EPA limit 80 µg/L worst single sample: 21.26 µg/L	6/6	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	3.1275 µg/L 5.2% of the EPA limit 60 µg/L worst single sample: 3.19 µg/L	6/6	SYR4	2014–2019
Dichloroacetic Acid	1.204 µg/L No EPA limit set worst single sample: 1.3 µg/L	4/6	SYR4	2014–2019
Nitrate-Nitrite	2510 µg/L 25% of the EPA limit 10000 µg/L worst single sample: 2600 µg/L	4/6	SYR4	2014–2017
Chromium	1.38 µg/L 1.4% of the EPA limit 100 µg/L worst single sample: 1.4 µg/L	2/6	SYR4	2014–2017
Combined Uranium	0.9986 µg/L 3.3% of the EPA limit 30 µg/L worst single sample: 1 µg/L	2/2	SYR4	2019
Thallium, Total	0.2480 µg/L 12% of the EPA limit 2 µg/L worst single sample: 0.2500 µg/L	2/6	SYR4	2014–2017
Trichloroacetic Acid	0.4960 µg/L No EPA limit set worst single sample: 0.5000 µg/L	2/6	SYR4	2014–2019
Monobromoacetic Acid	0.3700 µg/L No EPA limit set	1/6	SYR4	2014–2019

53 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, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

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Frequently asked questions about Berlin Waterworks

Is Berlin Waterworks tap water safe to drink?

EPA monitoring detected 23 contaminants in Berlin 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 Berlin Waterworks's water?

EPA monitoring detected Fluoride, Copper, Lead, Nitrate, Combined Radium (-226 And -228), and others. The full list with the level and data source for each is above.

How many people does Berlin Waterworks serve?

Berlin Waterworks reports serving 5,524 people in Wisconsin, per its EPA record.

Has Berlin Waterworks had any water quality violations?

The EPA has 83 violations on file for Berlin Waterworks, of which 57 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.