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Tap water quality report

Nelson Water & Sewer Dept

EPA monitoring tested this supplier for 73 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
15
detected
375
people served
3
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Buffalo

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.

3
health-based violations
110
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2008-07-01 → 2008-07-31
MCL Health-based Resolved 2008-07-01 → 2008-07-31
MCL Health-based Resolved 2008-07-01 → 2008-07-31
MR Monitoring Resolved 2009-07-01 → 2009-09-30
MR Monitoring Resolved 2009-07-01 → 2009-09-30
MR Monitoring Resolved 2009-07-01 → 2009-09-30
MR Monitoring Resolved 2009-07-01 → 2009-09-30
MR Monitoring Resolved 2009-07-01 → 2009-09-30
MR Monitoring Resolved 2009-07-01 → 2009-09-30
MR Monitoring Resolved 2009-07-01 → 2009-09-30

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
Nitrate
5581 µg/L 56%
of the EPA limit 10000 µg/L
worst single sample: 8980 µg/L
32/32 SYR4 2012–2019
Lead
0.0055 mg/L 37%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2023
Copper
235.8 µg/L 18%
of the EPA limit 1300 µg/L
worst single sample: 270 µg/L
10/10 SYR4 2014–2017
Lead
3.1575 µg/L 21%
of the EPA limit 15 µg/L
worst single sample: 3.24 µg/L
4/10 SYR4 2014–2017
Barium
27.565 µg/L 1.4%
of the EPA limit 2000 µg/L
worst single sample: 27.7 µg/L
2/2 SYR4 2014–2017
Fluoride
90 µg/L 2.3%
of the EPA limit 4000 µg/L
 2/2 SYR4 2014–2017
Monochloroacetic Acid
2.5255 µg/L
No EPA limit set
worst single sample: 2.58 µg/L
2/2 SYR4 2015–2018
Nitrate-Nitrite
2572.5 µg/L 26%
of the EPA limit 10000 µg/L
worst single sample: 2600 µg/L
2/2 SYR4 2014–2017
Total Haloacetic Acids (HAA5)
4.51955 µg/L 7.5%
of the EPA limit 60 µg/L
worst single sample: 4.679 µg/L
2/2 SYR4 2015–2018
Bromodichloromethane
0.3320 µg/L
No EPA limit set
 1/2 SYR4 2015–2018
Combined Radium (-226 And -228)
2.43 pCi/L 49%
of the EPA limit 5 pCi/L
 1/1 SYR4 2014
Dibromochloromethane
0.8210 µg/L
No EPA limit set
 1/2 SYR4 2015–2018
Dichloroacetic Acid
1.15 µg/L
No EPA limit set
 1/2 SYR4 2015–2018
Gross Alpha, Excl. Radon And U
1.8 pCi/L 12%
of the EPA limit 15 pCi/L
 1/1 SYR4 2014
TTHM
1.153 µg/L 1.4%
of the EPA limit 80 µg/L
 1/2 SYR4 2015–2018
58 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, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDibromoacetic AcidDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Nelson Water & Sewer Dept

Is Nelson Water & Sewer Dept tap water safe to drink?

EPA monitoring detected 15 contaminants in Nelson Water & Sewer Dept'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 Nelson Water & Sewer Dept's water?

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

How many people does Nelson Water & Sewer Dept serve?

Nelson Water & Sewer Dept reports serving 375 people in Wisconsin, per its EPA record.

Has Nelson Water & Sewer Dept had any water quality violations?

The EPA has 110 violations on file for Nelson Water & Sewer Dept, of which 3 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.