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Tap water quality report

Three Lakes Sanitary District

EPA monitoring tested this supplier for 62 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

62
contaminants tested
8
detected
500
people served
11
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Oneida

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.

11
health-based violations
32
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2025-01-16
TT Health-based Resolved 2025-01-16
TT Health-based Resolved 2025-01-16
TT Health-based Resolved 2024-10-17
MCL Health-based Resolved 2008-08-01 → 2008-08-31
MCL Health-based Resolved 2008-08-01 → 2008-08-31
MCL Health-based Resolved 2008-08-01 → 2008-08-31
MCL Health-based Resolved 2008-08-01 → 2008-08-31
MCL Health-based Resolved 2008-08-01 → 2008-08-31
MCL Health-based Resolved 2008-08-01 → 2008-08-31

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
Nitrate
3670 µg/L 37%
of the EPA limit 10000 µg/L
worst single sample: 3700 µg/L
24/24 SYR4 2012–2019
Lead
0.0112 mg/L 75%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2023
Copper
302 µg/L 23%
of the EPA limit 1300 µg/L
worst single sample: 320 µg/L
10/10 SYR4 2014–2017
Lead
5.23 µg/L 35%
of the EPA limit 15 µg/L
worst single sample: 6.4 µg/L
10/10 SYR4 2014–2017
Barium
48.9 µg/L 2.4%
of the EPA limit 2000 µg/L
worst single sample: 51 µg/L
4/4 SYR4 2014–2017
Nitrate-Nitrite
3780 µg/L 38%
of the EPA limit 10000 µg/L
worst single sample: 3900 µg/L
4/4 SYR4 2014–2017
Chromium
1.195 µg/L 1.2%
of the EPA limit 100 µg/L
worst single sample: 1.2 µg/L
2/4 SYR4 2014–2017
Combined Radium (-226 And -228)
1.41 pCi/L 28%
of the EPA limit 5 pCi/L
worst single sample: 1.45 pCi/L
2/2 SYR4 2014
54 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 TetrachlorideChlordaneDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Three Lakes Sanitary District

Is Three Lakes Sanitary District tap water safe to drink?

EPA monitoring detected 8 contaminants in Three Lakes Sanitary District'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 Three Lakes Sanitary District's water?

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

How many people does Three Lakes Sanitary District serve?

Three Lakes Sanitary District reports serving 500 people in Wisconsin, per its EPA record.

Has Three Lakes Sanitary District had any water quality violations?

The EPA has 32 violations on file for Three Lakes Sanitary District, of which 11 are health-based (a contaminant limit or required treatment was breached) and 2 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.