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Tap water quality report

Delafield Lakes 404

EPA monitoring tested this supplier for 63 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

63
contaminants tested
9
detected
40
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
35
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2021-06-01
MR Monitoring Resolved 2021-06-01
MR Monitoring Resolved 2021-06-01
MR Monitoring Resolved 2021-06-01
MON Monitoring Resolved 2020-06-01 → 2020-06-30
MON Monitoring Resolved 2020-06-01 → 2020-06-30
MON Monitoring Resolved 2020-06-01 → 2020-06-30
MR Monitoring Resolved 2020-01-01 → 2020-12-31
MR Monitoring Resolved 2020-01-01 → 2020-12-31
MR Monitoring Resolved 2020-01-01 → 2020-12-31

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
36.7 µg/L 2.8%
of the EPA limit 1300 µg/L
worst single sample: 43 µg/L
15/15 SYR4 2012–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 8/8 LCR 2024
Lead
3.025 µg/L 20%
of the EPA limit 15 µg/L
worst single sample: 3.4 µg/L
6/15 SYR4 2012–2018
Barium
250 µg/L 13%
of the EPA limit 2000 µg/L
 3/3 SYR4 2012–2018
Combined Radium (-226 And -228)
3.2877 pCi/L 66%
of the EPA limit 5 pCi/L
worst single sample: 3.395 pCi/L
3/3 SYR4 2012–2018
Fluoride
279 µg/L 7%
of the EPA limit 4000 µg/L
worst single sample: 280 µg/L
3/3 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
4.736 pCi/L 32%
of the EPA limit 15 pCi/L
worst single sample: 4.85 pCi/L
2/2 SYR4 2015–2018
Arsenic
1.1 µg/L 11%
of the EPA limit 10 µg/L
 1/3 SYR4 2012–2018
Nitrate-Nitrite
160 µg/L 1.6%
of the EPA limit 10000 µg/L
 1/3 SYR4 2012–2018
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, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitrateNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Delafield Lakes 404

Is Delafield Lakes 404 tap water safe to drink?

EPA monitoring detected 9 contaminants in Delafield Lakes 404'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 Delafield Lakes 404's water?

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

How many people does Delafield Lakes 404 serve?

Delafield Lakes 404 reports serving 40 people in Wisconsin, per its EPA record.

Has Delafield Lakes 404 had any water quality violations?

The EPA has 35 violations on file for Delafield Lakes 404, 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.