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Tap water quality report

Nashotah House

EPA monitoring tested this supplier for 64 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

64
contaminants tested
12
detected
350
people served
0
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Private
Counties served
Waukesha

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.

0
health-based violations
9
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2025-01-01
MR Monitoring Resolved 2025-01-01
MR Monitoring Resolved 2013-01-01
MR Monitoring Resolved 2013-01-01
Other Monitoring Resolved 2003-10-01
Other Monitoring Resolved 2003-10-01
MR Monitoring Resolved 1993-10-01 → 1993-10-31
MR Monitoring Resolved 1993-10-01 → 1993-10-31
MR Monitoring Resolved 1993-10-01 → 1993-10-31

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
210 µg/L 16%
of the EPA limit 1300 µg/L
worst single sample: 217 µg/L
15/15 SYR4 2012–2018
Lead
0.0113 mg/L 76%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2024
Lead
3.255 µg/L 22%
of the EPA limit 15 µg/L
worst single sample: 3.45 µg/L
11/15 SYR4 2012–2018
Nitrate
1500 µg/L 15%
of the EPA limit 10000 µg/L
 10/10 SYR4 2012–2017
Nitrate-Nitrite
897.26 µg/L 9%
of the EPA limit 10000 µg/L
worst single sample: 911 µg/L
4/4 SYR4 2012–2019
Barium
50.059 µg/L 2.5%
of the EPA limit 2000 µg/L
worst single sample: 50.3 µg/L
3/3 SYR4 2012–2018
Chromium
2.9675 µg/L 3%
of the EPA limit 100 µg/L
worst single sample: 3.09 µg/L
2/3 SYR4 2012–2018
Fluoride
99 µg/L 2.5%
of the EPA limit 4000 µg/L
worst single sample: 100 µg/L
2/3 SYR4 2012–2018
Nitrite
25.06 µg/L 2.5%
of the EPA limit 1000 µg/L
worst single sample: 25.8 µg/L
2/3 SYR4 2012–2018
Combined Radium (-226 And -228)
0.1000 pCi/L 2%
of the EPA limit 5 pCi/L
 1/1 SYR4 2015
Gross Alpha, Excl. Radon And U
2.5 pCi/L 17%
of the EPA limit 15 pCi/L
 1/1 SYR4 2015
Styrene
0.3300 µg/L 0.3%
of the EPA limit 100 µg/L
 1/3 SYR4 2012–2018
52 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Nashotah House

Is Nashotah House tap water safe to drink?

EPA monitoring detected 12 contaminants in Nashotah House'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 Nashotah House's water?

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

How many people does Nashotah House serve?

Nashotah House reports serving 350 people in Wisconsin, per its EPA record.

Has Nashotah House had any water quality violations?

The EPA has 9 violations on file for Nashotah House, of which 0 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.