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Tap water quality report

Northernaire Sanitary District

EPA monitoring tested this supplier for 75 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

75
contaminants tested
18
detected
315
people served
4
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Oneida

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.

4
health-based violations
56
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-12-23
TT Health-based Resolved 2024-12-23
TT Health-based Resolved 2024-12-23
TT Health-based Resolved 2024-12-23
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2025-07-01
MON Monitoring Resolved 2025-05-01 → 2025-05-31
MON Monitoring Resolved 2025-05-01 → 2025-05-31

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
Chloroform
7.73 µg/L
No EPA limit set
worst single sample: 11 µg/L
28/29 SYR4 2012–2019
Bromodichloromethane
3.11 µg/L
No EPA limit set
worst single sample: 3.6 µg/L
23/29 SYR4 2012–2019
Copper
49.9 µg/L 3.8%
of the EPA limit 1300 µg/L
worst single sample: 66 µg/L
15/15 SYR4 2012–2018
Lead
1.755 µg/L 12%
of the EPA limit 15 µg/L
worst single sample: 2.6 µg/L
14/15 SYR4 2012–2018
TTHM
11.7815 µg/L 15%
of the EPA limit 80 µg/L
worst single sample: 13.47 µg/L
12/12 SYR4 2012–2019
Lead
0.0025 mg/L 17%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
Xylenes, Total
5.08 µg/L 0.1%
of the EPA limit 10000 µg/L
worst single sample: 5.2 µg/L
9/28 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
4.792 µg/L 8%
of the EPA limit 60 µg/L
worst single sample: 5.8 µg/L
8/8 SYR4 2012–2019
Ethylbenzene
1.28 µg/L 0.2%
of the EPA limit 700 µg/L
worst single sample: 1.3 µg/L
5/27 SYR4 2012–2019
Trichloroacetic Acid
2.06 µg/L
No EPA limit set
worst single sample: 2.2 µg/L
5/8 SYR4 2012–2019
Dibromochloromethane
3.525 µg/L
No EPA limit set
worst single sample: 3.6 µg/L
4/21 SYR4 2012–2019
Dichloroacetic Acid
3.7675 µg/L
No EPA limit set
worst single sample: 4.3 µg/L
4/8 SYR4 2012–2019
Arsenic
3.65 µg/L 37%
of the EPA limit 10 µg/L
worst single sample: 3.7 µg/L
3/3 SYR4 2012–2018
Bromoform
1.076 µg/L
No EPA limit set
worst single sample: 1.1 µg/L
3/13 SYR4 2012–2019
Dibromoacetic Acid
0.6500 µg/L
No EPA limit set
 3/8 SYR4 2012–2019
Barium
38.06 µg/L 1.9%
of the EPA limit 2000 µg/L
worst single sample: 40 µg/L
2/3 SYR4 2012–2018
Combined Radium (-226 And -228)
1.5 pCi/L 30%
of the EPA limit 5 pCi/L
 1/1 SYR4 2015
Fluoride
110 µg/L 2.8%
of the EPA limit 4000 µg/L
 1/3 SYR4 2012–2018
57 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, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDinosebDiquatEthylene DibromideEndothallEndrinGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitrateNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Northernaire Sanitary District

Is Northernaire Sanitary District tap water safe to drink?

EPA monitoring detected 18 contaminants in Northernaire Sanitary District'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 Northernaire Sanitary District's water?

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

How many people does Northernaire Sanitary District serve?

Northernaire Sanitary District reports serving 315 people in Wisconsin, per its EPA record.

Has Northernaire Sanitary District had any water quality violations?

The EPA has 56 violations on file for Northernaire Sanitary District, of which 4 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.