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Lac Du Flambeau

EPA monitoring tested this supplier for 101 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

101
contaminants tested
15
detected
2,962
people served
2
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Native American

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.

2
health-based violations
17
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2012-04-01 → 2012-04-30
MCL Health-based Resolved 2012-04-01 → 2012-04-30
RPT Monitoring Resolved 2023-10-01
RPT Monitoring Resolved 2023-10-01
RPT Monitoring Resolved 2023-10-01
MR Monitoring Resolved 2017-01-01 → 2019-12-31
MR Monitoring Resolved 2017-01-01 → 2019-12-31
MR Monitoring Resolved 2017-01-01 → 2019-12-31
MR Monitoring Resolved 2017-01-01 → 2019-12-31
MR Monitoring Resolved 2011-01-01 → 2013-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0082 µg/L 1/2 2025

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
140 µg/L 11%
of the EPA limit 1300 µg/L
worst single sample: 190 µg/L
61/61 SYR4 2012–2019
Lead
5.055 µg/L 34%
of the EPA limit 15 µg/L
worst single sample: 59 µg/L
60/61 SYR4 2012–2019
Nitrate
3995 µg/L 40%
of the EPA limit 10000 µg/L
worst single sample: 4400 µg/L
30/30 SYR4 2012–2019
Lead
0.00069 mg/L 4.6%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
TTHM
15.4 µg/L 19%
of the EPA limit 80 µg/L
worst single sample: 18 µg/L
14/14 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
6.835 µg/L 11%
of the EPA limit 60 µg/L
worst single sample: 8.2 µg/L
14/14 SYR4 2012–2019
Barium
12.8 µg/L 0.6%
of the EPA limit 2000 µg/L
worst single sample: 13 µg/L
5/6 SYR4 2012–2018
Chromium
1.1 µg/L 1.1%
of the EPA limit 100 µg/L
 4/6 SYR4 2012–2018
Arsenic
1.49 µg/L 15%
of the EPA limit 10 µg/L
worst single sample: 1.5 µg/L
3/6 SYR4 2012–2018
Cyanide
7 µg/L 3.5%
of the EPA limit 200 µg/L
 2/6 SYR4 2012–2018
Cadmium
0.6400 µg/L 13%
of the EPA limit 5 µg/L
 1/6 SYR4 2012–2018
Di(2-ethylhexyl) Phthalate
0.6400 µg/L 11%
of the EPA limit 6 µg/L
 1/4 SYR4 2016–2019
Fluoride
670 µg/L 17%
of the EPA limit 4000 µg/L
 1/4 SYR4 2015–2018
Mercury
0.8000 µg/L 40%
of the EPA limit 2 µg/L
 1/6 SYR4 2012–2018
86 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNetfosaaNfdhaNmefosaaNitrate-NitriteNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
VALLIERE, SCOTT
Phone
715-588-7887
Email
[email protected]

Frequently asked questions about Lac Du Flambeau

Is Lac Du Flambeau tap water safe to drink?

EPA monitoring detected 15 contaminants in Lac Du Flambeau'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 Lac Du Flambeau's water?

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

How many people does Lac Du Flambeau serve?

Lac Du Flambeau reports serving 2,962 people in Wisconsin, per its EPA record.

Has Lac Du Flambeau had any water quality violations?

The EPA has 17 violations on file for Lac Du Flambeau, of which 2 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.