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Tap water quality report

Lake Forest Water Coop

EPA monitoring tested this supplier for 69 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

69
contaminants tested
11
detected
400
people served
32
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Private
Counties served
Dane

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.

32
health-based violations
225
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-11-17
TT Health-based Resolved 2024-11-17
TT Health-based Resolved 2024-11-17
TT Health-based Resolved 2024-11-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
MCL Health-based Resolved 2006-08-01 → 2006-08-31
MCL Health-based Resolved 2006-08-01 → 2006-08-31
MCL Health-based Resolved 2006-08-01 → 2006-08-31
MCL Health-based Resolved 2006-08-01 → 2006-08-31

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
Copper
84.295 µg/L 6.5%
of the EPA limit 1300 µg/L
worst single sample: 101 µg/L
14/15 SYR4 2012–2018
Lead
0.0081 mg/L 54%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
Combined Radium (-226 And -228)
0.2011 pCi/L 4%
of the EPA limit 5 pCi/L
worst single sample: 0.2020 pCi/L
4/4 SYR4 2015–2016
Barium
21.74 µg/L 1.1%
of the EPA limit 2000 µg/L
worst single sample: 22.3 µg/L
2/2 SYR4 2018
Carbon Tetrachloride
2.5895 µg/L 52%
of the EPA limit 5 µg/L
worst single sample: 2.7 µg/L
2/14 SYR4 2012–2019
Chloroform
1.1505 µg/L
No EPA limit set
worst single sample: 1.2 µg/L
2/14 SYR4 2012–2019
Styrene
0.1895 µg/L 0.2%
of the EPA limit 100 µg/L
worst single sample: 0.1900 µg/L
2/14 SYR4 2012–2019
Di(2-ethylhexyl) Phthalate
4.6 µg/L 77%
of the EPA limit 6 µg/L
 1/2 SYR4 2018
Fluoride
116 µg/L 2.9%
of the EPA limit 4000 µg/L
 1/2 SYR4 2018
Gross Alpha, Excl. Radon And U
2.43 pCi/L 16%
of the EPA limit 15 pCi/L
 1/1 SYR4 2016
Gross Beta Particle Activity
2.13 pCi/L
No EPA limit set
 1/1 SYR4 2015
58 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, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranChlordaneChromiumDichloromethaneDalaponDibromochloromethaneDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitrateNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Lake Forest Water Coop

Is Lake Forest Water Coop tap water safe to drink?

EPA monitoring detected 11 contaminants in Lake Forest Water Coop'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 Lake Forest Water Coop's water?

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

How many people does Lake Forest Water Coop serve?

Lake Forest Water Coop reports serving 400 people in Wisconsin, per its EPA record.

Has Lake Forest Water Coop had any water quality violations?

The EPA has 225 violations on file for Lake Forest Water Coop, of which 32 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.