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Tap water quality report

Waterloo Waterworks

EPA monitoring tested this supplier for 104 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
19
detected
3,520
people served
19
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Jefferson

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.

19
health-based violations
43
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2019-10-01 → 2020-11-24
TT Health-based Resolved 2019-10-01 → 2020-11-24
TT Health-based Resolved 2019-10-01 → 2020-11-24
TT Health-based Resolved 2019-10-01 → 2020-11-24
TT Health-based Resolved 2018-01-01
TT Health-based Resolved 2018-01-01
TT Health-based Resolved 2018-01-01
TT Health-based Resolved 2018-01-01
TT Health-based Resolved 2018-01-01 → 2018-10-18
TT Health-based Resolved 2018-01-01 → 2018-10-18

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
Nitrate
6020 µg/L 60%
of the EPA limit 10000 µg/L
worst single sample: 8400 µg/L
128/128 SYR4 2012–2019
Fluoride
1050 µg/L 26%
of the EPA limit 4000 µg/L
worst single sample: 1150 µg/L
101/196 SYR4 2012–2019
Copper
695.5 µg/L 54%
of the EPA limit 1300 µg/L
worst single sample: 850 µg/L
42/43 SYR4 2014–2017
Lead
18.95 µg/L 126%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 120 µg/L
42/43 SYR4 2014–2017
Dibromochloromethane
1.89 µg/L
No EPA limit set
worst single sample: 2.4 µg/L
22/26 SYR4 2013–2019
Lead
0.0013 mg/L 8.7%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2023
Bromoform
2.335 µg/L
No EPA limit set
worst single sample: 2.5 µg/L
12/26 SYR4 2013–2019
Bromodichloromethane
1.0695 µg/L
No EPA limit set
worst single sample: 1.2 µg/L
10/24 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
1.16 µg/L 1.9%
of the EPA limit 60 µg/L
worst single sample: 1.2 µg/L
9/9 SYR4 2013–2019
Dibromoacetic Acid
0.9845 µg/L
No EPA limit set
worst single sample: 1.1 µg/L
8/9 SYR4 2013–2019
TTHM
5.8415 µg/L 7.3%
of the EPA limit 80 µg/L
worst single sample: 6.37 µg/L
8/9 SYR4 2013–2019
Barium
42 µg/L 2.1%
of the EPA limit 2000 µg/L
worst single sample: 44 µg/L
6/6 SYR4 2014–2017
Nitrate-Nitrite
5850 µg/L 59%
of the EPA limit 10000 µg/L
worst single sample: 5900 µg/L
6/6 SYR4 2014–2017
Combined Radium (-226 And -228)
2.9535 pCi/L 59%
of the EPA limit 5 pCi/L
worst single sample: 3.21 pCi/L
4/4 SYR4 2014–2017
Xylenes, Total
2.72 µg/L 0%
of the EPA limit 10000 µg/L
worst single sample: 2.8 µg/L
3/23 SYR4 2012–2019
Chlorobenzene
0.6500 µg/L 0.7%
of the EPA limit 100 µg/L
 1/23 SYR4 2012–2019
Dichloroacetic Acid
0.1500 µg/L
No EPA limit set
 1/9 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
3.21 pCi/L 21%
of the EPA limit 15 pCi/L
 1/1 SYR4 2014
Monobromoacetic Acid
0.2500 µg/L
No EPA limit set
 1/9 SYR4 2013–2019
85 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, TotalCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Waterloo Waterworks

Is Waterloo Waterworks tap water safe to drink?

EPA monitoring detected 19 contaminants in Waterloo 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 Waterloo Waterworks's water?

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

How many people does Waterloo Waterworks serve?

Waterloo Waterworks reports serving 3,520 people in Wisconsin, per its EPA record.

Has Waterloo Waterworks had any water quality violations?

The EPA has 43 violations on file for Waterloo Waterworks, of which 19 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.