Is Seneca Sanitary Dist No 1 Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Crawford

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2004-12-01 → 2004-12-31
MCL	Health-based	Resolved	2004-12-01 → 2004-12-31
MCL	Health-based	Resolved	2004-12-01 → 2004-12-31
MCL	Health-based	Resolved	2004-12-01 → 2004-12-31
MCL	Health-based	Resolved	2004-12-01 → 2004-12-31
MCL	Health-based	Resolved	2003-07-01 → 2003-07-31
MCL	Health-based	Resolved	2003-07-01 → 2003-07-31
MCL	Health-based	Resolved	2003-07-01 → 2003-07-31
MCL	Health-based	Resolved	2003-07-01 → 2003-07-31
MCL	Health-based	Resolved	2003-07-01 → 2003-07-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	3750 µg/L 38% of the EPA limit 10000 µg/L	16/16	SYR4	2012–2019
Lead	0.0013 mg/L 8.8% of the EPA limit 0.0150 mg/L	14/14	LCR	2023
Copper	231 µg/L 18% of the EPA limit 1300 µg/L	8/10	SYR4	2014–2017
Bromodichloromethane	2.69 µg/L No EPA limit set	6/6	SYR4	2015–2019
Chloroform	1.68 µg/L No EPA limit set	6/6	SYR4	2015–2019
Monochloroacetic Acid	121 µg/L No EPA limit set	6/6	SYR4	2015–2019
TTHM	7.72 µg/L 9.7% of the EPA limit 80 µg/L	6/6	SYR4	2015–2019
Total Haloacetic Acids (HAA5)	122.155 µg/L 204% of the EPA limit, in the worst sample — 60 µg/L	6/6	SYR4	2015–2019
Dibromochloromethane	3.35 µg/L No EPA limit set	4/6	SYR4	2015–2019
Lead	3.63 µg/L 24% of the EPA limit 15 µg/L	4/10	SYR4	2014–2017
Barium	59 µg/L 2.9% of the EPA limit 2000 µg/L	2/2	SYR4	2014–2017
Bromoform	1.54 µg/L No EPA limit set	2/6	SYR4	2015–2019
Nitrate-Nitrite	3750 µg/L 38% of the EPA limit 10000 µg/L	2/2	SYR4	2014–2017
Combined Radium (-226 And -228)	2.12 pCi/L 42% of the EPA limit 5 pCi/L	1/1	SYR4	2014
Dibromoacetic Acid	0.9500 µg/L No EPA limit set	1/6	SYR4	2015–2019
Fluoride	80 µg/L 2% of the EPA limit 4000 µg/L	1/2	SYR4	2014–2017
Gross Alpha, Excl. Radon And U	1.6 pCi/L 11% of the EPA limit 15 pCi/L	1/1	SYR4	2014
Monobromoacetic Acid	0.8450 µg/L No EPA limit set	1/6	SYR4	2015–2019

55 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, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDichloroacetic AcidDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Seneca Sanitary Dist No 1

Is Seneca Sanitary Dist No 1 tap water safe to drink?

EPA monitoring detected 18 contaminants in Seneca Sanitary Dist No 1'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 Seneca Sanitary Dist No 1's water?

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

How many people does Seneca Sanitary Dist No 1 serve?

Seneca Sanitary Dist No 1 reports serving 250 people in Wisconsin, per its EPA record.

Has Seneca Sanitary Dist No 1 had any water quality violations?

The EPA has 62 violations on file for Seneca Sanitary Dist No 1, of which 18 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.