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Tap water quality report

North Shore Water Commission

EPA monitoring tested this supplier for 105 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

105
contaminants tested
16
detected
35,598
people served
1
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Surface water
Ownership
Local government
Counties served
Milwaukee

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.

1
health-based violations
35
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 1993-01-01 → 1994-12-31
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30

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
84.65 µg/L 6.5%
of the EPA limit 1300 µg/L
worst single sample: 190 µg/L
148/153 SYR4 2012–2018
Lead
12.7 µg/L 85%
of the EPA limit 15 µg/L
worst single sample: 66 µg/L
147/153 SYR4 2012–2018
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
worst single sample: 1380 µg/L
104/200 SYR4 2012–2019
Nitrate-Nitrite
490 µg/L 4.9%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.0110 mg/L 73%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2018
Bromodichloromethane
7.3 µg/L
No EPA limit set
worst single sample: 8 µg/L
11/11 SYR4 2012–2017
Chloroform
10.5 µg/L
No EPA limit set
worst single sample: 13 µg/L
11/11 SYR4 2012–2017
Dibromochloromethane
3.8 µg/L
No EPA limit set
 11/11 SYR4 2012–2017
TTHM
22.28 µg/L 28%
of the EPA limit 80 µg/L
worst single sample: 25.2 µg/L
9/9 SYR4 2012–2013
Barium
21 µg/L 1.1%
of the EPA limit 2000 µg/L
 8/8 SYR4 2012–2019
Dibromoacetic Acid
1.4 µg/L
No EPA limit set
 8/8 SYR4 2012–2013
Dichloroacetic Acid
6.255 µg/L
No EPA limit set
worst single sample: 6.5 µg/L
8/8 SYR4 2012–2013
Total Haloacetic Acids (HAA5)
15.3 µg/L 26%
of the EPA limit 60 µg/L
worst single sample: 16.7 µg/L
8/8 SYR4 2012–2013
Trichloroacetic Acid
3.895 µg/L
No EPA limit set
worst single sample: 4 µg/L
8/8 SYR4 2012–2013
Monobromoacetic Acid
3.19 µg/L
No EPA limit set
worst single sample: 3.4 µg/L
3/8 SYR4 2012–2013
Monochloroacetic Acid
2.08 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
2/8 SYR4 2012–2013
89 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about North Shore Water Commission

Is North Shore Water Commission tap water safe to drink?

EPA monitoring detected 16 contaminants in North Shore Water Commission'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 North Shore Water Commission's water?

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

How many people does North Shore Water Commission serve?

North Shore Water Commission reports serving 35,598 people in Wisconsin, per its EPA record.

Has North Shore Water Commission had any water quality violations?

The EPA has 35 violations on file for North Shore Water Commission, of which 1 is 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.