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Oconto Falls Waterworks

EPA monitoring tested this supplier for 74 contaminants and detected 17. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
17
detected
2,892
people served
2
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Oconto

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.

2
health-based violations
19
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
Other Monitoring Resolved 2024-10-17
MR Monitoring Resolved 2012-09-01 → 2012-09-30
MR Monitoring Resolved 2012-09-01 → 2012-09-30
MR Monitoring Resolved 2012-09-01 → 2012-09-30
MR Monitoring Resolved 2012-09-01 → 2012-09-30
MR Monitoring Resolved 2012-07-01 → 2012-09-30
MR Monitoring Resolved 2012-07-01 → 2012-09-30
MR Monitoring Resolved 2012-07-01 → 2012-09-30

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
1427.5 µg/L 36%
of the EPA limit 4000 µg/L
worst single sample: 5900 µg/L
82/163 SYR4 2012–2019
Copper
507.5 µg/L 39%
of the EPA limit 1300 µg/L
worst single sample: 560 µg/L
30/30 SYR4 2013–2019
Lead
11.2 µg/L 75%
of the EPA limit 15 µg/L
worst single sample: 15 µg/L
29/30 SYR4 2013–2019
Lead
0.0110 mg/L 73%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2023
Total Haloacetic Acids (HAA5)
3.33 µg/L 5.6%
of the EPA limit 60 µg/L
worst single sample: 3.61 µg/L
9/9 SYR4 2013–2019
Barium
157.5 µg/L 7.9%
of the EPA limit 2000 µg/L
worst single sample: 160 µg/L
6/6 SYR4 2014–2017
TTHM
7.745 µg/L 9.7%
of the EPA limit 80 µg/L
worst single sample: 10.1 µg/L
6/9 SYR4 2013–2019
Arsenic
5.7 µg/L 57%
of the EPA limit 10 µg/L
worst single sample: 6.3 µg/L
5/6 SYR4 2014–2017
Combined Radium (-226 And -228)
4.326 pCi/L 87%
of the EPA limit 5 pCi/L
worst single sample: 4.35 pCi/L
5/5 SYR4 2014–2017
Dichloroacetic Acid
1.98 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
5/9 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
5.374 pCi/L 36%
of the EPA limit 15 pCi/L
worst single sample: 5.47 pCi/L
4/4 SYR4 2014–2017
Nitrate-Nitrite
573.5 µg/L 5.7%
of the EPA limit 10000 µg/L
worst single sample: 580 µg/L
2/6 SYR4 2014–2017
Bromodichloromethane
2.4 µg/L
No EPA limit set
 1/9 SYR4 2013–2019
Chloroform
6.6 µg/L
No EPA limit set
 1/12 SYR4 2013–2019
Dibromoacetic Acid
0.3100 µg/L
No EPA limit set
 1/9 SYR4 2013–2019
Dibromochloromethane
1.1 µg/L
No EPA limit set
 1/9 SYR4 2013–2019
Trichloroacetic Acid
1.1 µg/L
No EPA limit set
 1/9 SYR4 2013–2019
57 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, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitrateNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Oconto Falls Waterworks

Is Oconto Falls Waterworks tap water safe to drink?

EPA monitoring detected 17 contaminants in Oconto Falls 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 Oconto Falls Waterworks's water?

EPA monitoring detected Fluoride, Copper, Lead, Lead, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Oconto Falls Waterworks serve?

Oconto Falls Waterworks reports serving 2,892 people in Wisconsin, per its EPA record.

Has Oconto Falls Waterworks had any water quality violations?

The EPA has 19 violations on file for Oconto Falls Waterworks, of which 2 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.