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Tap water quality report

Delafield Square

EPA monitoring tested this supplier for 69 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

69
contaminants tested
8
detected
587
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
10
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2014-01-01
MR Monitoring Resolved 2014-01-01
MR Monitoring Resolved 2012-04-01 → 2012-06-30
MR Monitoring Resolved 2012-04-01 → 2012-06-30
MR Monitoring Resolved 2012-04-01 → 2012-06-30
MR Monitoring Resolved 2012-04-01 → 2012-06-30
MR Monitoring Resolved 2012-04-01 → 2012-06-30
Other Monitoring Resolved 2008-10-01
Other Monitoring Resolved 2008-10-01
Other Monitoring Resolved 2008-10-01

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
150 µg/L 12%
of the EPA limit 1300 µg/L
worst single sample: 220 µg/L
15/15 SYR4 2013–2019
Lead
4.54 µg/L 30%
of the EPA limit 15 µg/L
worst single sample: 4.9 µg/L
13/15 SYR4 2013–2019
Lead
0.0012 mg/L 8%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
Arsenic
3.22 µg/L 32%
of the EPA limit 10 µg/L
worst single sample: 3.3 µg/L
3/3 SYR4 2012–2018
Barium
1.5665 µg/L 0.1%
of the EPA limit 2000 µg/L
worst single sample: 1.6 µg/L
2/3 SYR4 2012–2018
Fluoride
269 µg/L 6.7%
of the EPA limit 4000 µg/L
worst single sample: 270 µg/L
2/3 SYR4 2012–2018
Combined Radium (-226 And -228)
1.4 pCi/L 28%
of the EPA limit 5 pCi/L
 1/1 SYR4 2015
Nitrate-Nitrite
2500 µg/L 25%
of the EPA limit 10000 µg/L
 1/3 SYR4 2012–2018
61 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, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitrateNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Delafield Square

Is Delafield Square tap water safe to drink?

EPA monitoring detected 8 contaminants in Delafield Square'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 Square's water?

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

How many people does Delafield Square serve?

Delafield Square reports serving 587 people in Wisconsin, per its EPA record.

Has Delafield Square had any water quality violations?

The EPA has 10 violations on file for Delafield Square, 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.