Tap WaterIndex

Tap water quality report

Prairie Du Sac Waterworks

EPA monitoring tested this supplier for 108 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
12
detected
4,006
people served
35
health-based violations
Water source
Ground water
Ownership
Local government
Counties served
Sauk

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.

35
health-based violations
46
violations on file
1
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-10-17
MCL Health-based Resolved 2014-10-01 → 2014-10-31
MCL Health-based Resolved 2014-10-01 → 2014-10-31
MCL Health-based Resolved 2014-10-01 → 2014-10-31
MCL Health-based Resolved 2014-10-01 → 2014-10-31
MCL Health-based Resolved 2014-10-01 → 2014-10-31
MCL Health-based Resolved 2014-10-01 → 2014-12-31
MCL Health-based Resolved 2014-10-01 → 2014-12-31
MCL Health-based Resolved 2014-10-01 → 2014-12-31
MCL Health-based Resolved 2014-10-01 → 2014-12-31

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
Fluoride
1012.5 µg/L 25%
of the EPA limit 4000 µg/L
worst single sample: 1050 µg/L
96/198 SYR4 2012–2019
Copper
175.6 µg/L 14%
of the EPA limit 1300 µg/L
worst single sample: 181 µg/L
38/40 SYR4 2014–2017
Nitrate
10900 µg/L 109%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 12000 µg/L
32/58 SYR4 2012–2019
Combined Radium (-226 And -228)
5.44 pCi/L 109%
of the EPA limit, at the 95th percentile of samples — 5 pCi/L
worst single sample: 6.2 pCi/L
27/27 SYR4 2012–2019
Lead
11.15 µg/L 74%
of the EPA limit 15 µg/L
worst single sample: 12.2 µg/L
16/40 SYR4 2014–2017
Gross Alpha, Excl. Radon And U
8.46 pCi/L 56%
of the EPA limit 15 pCi/L
worst single sample: 10 pCi/L
15/15 SYR4 2012–2017
Lead
0.0014 mg/L 9.3%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2023
Gross Beta Particle Activity
7.92 pCi/L
No EPA limit set
worst single sample: 8.2 pCi/L
8/8 SYR4 2013–2015
Barium
29 µg/L 1.5%
of the EPA limit 2000 µg/L
worst single sample: 30.4 µg/L
6/6 SYR4 2012–2017
Combined Uranium
2.3845 µg/L 7.9%
of the EPA limit 30 µg/L
worst single sample: 2.41 µg/L
2/2 SYR4 2012–2015
Nitrate-Nitrite
9700 µg/L 97%
of the EPA limit 10000 µg/L
 1/5 SYR4 2014–2017
Total Haloacetic Acids (HAA5)
0.2000 µg/L 0.3%
of the EPA limit 60 µg/L
 1/3 SYR4 2019
96 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Prairie Du Sac Waterworks

Is Prairie Du Sac Waterworks tap water safe to drink?

EPA monitoring detected 12 contaminants in Prairie Du Sac Waterworks'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 Prairie Du Sac Waterworks's water?

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

How many people does Prairie Du Sac Waterworks serve?

Prairie Du Sac Waterworks reports serving 4,006 people, per its EPA record.

Has Prairie Du Sac Waterworks had any water quality violations?

The EPA has 46 violations on file for Prairie Du Sac Waterworks, of which 35 are health-based (a contaminant limit or required treatment was breached) and 1 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.