Is Poynette Waterworks Tap Water Safe? Quality Report

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

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
TT	Health-based	Resolved	2024-12-01
TT	Health-based	Resolved	2024-12-01
TT	Health-based	Resolved	2024-12-01
TT	Health-based	Resolved	2024-12-01
Other	Monitoring	Resolved	2024-12-01
Other	Monitoring	Resolved	2024-12-01
Other	Monitoring	Resolved	2024-07-01
Other	Monitoring	Resolved	2024-07-01
Other	Monitoring	Resolved	2024-07-01
Other	Monitoring	Resolved	2024-07-01

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Fluoride	1321 µg/L 33% of the EPA limit 4000 µg/L worst single sample: 7210 µg/L	119/217	SYR4	2012–2019
Nitrate-Nitrite	9552 µg/L 96% of the EPA limit 10000 µg/L worst single sample: 9570 µg/L	39/44	SYR4	2012–2019
Copper	296 µg/L 23% of the EPA limit 1300 µg/L	21/21	SYR4	2012–2017
Lead	0.0031 mg/L 20% of the EPA limit 0.0150 mg/L	16/16	LCR	2023
Bromodichloromethane	3.83 µg/L No EPA limit set worst single sample: 3.9 µg/L	8/16	SYR4	2013–2019
Chloroform	7.66 µg/L No EPA limit set worst single sample: 7.8 µg/L	8/16	SYR4	2013–2019
Dibromochloromethane	2.065 µg/L No EPA limit set worst single sample: 2.1 µg/L	8/16	SYR4	2013–2019
TTHM	13.4925 µg/L 17% of the EPA limit 80 µg/L worst single sample: 13.65 µg/L	8/8	SYR4	2013–2019
Combined Radium (-226 And -228)	3.181 pCi/L 64% of the EPA limit 5 pCi/L worst single sample: 3.76 pCi/L	7/7	SYR4	2012–2014
Gross Alpha, Excl. Radon And U	3.799 pCi/L 25% of the EPA limit 15 pCi/L worst single sample: 3.94 pCi/L	7/7	SYR4	2012–2014
Dichloroacetic Acid	2.65 µg/L No EPA limit set worst single sample: 2.9 µg/L	6/8	SYR4	2013–2019
Nitrate	5400 µg/L 54% of the EPA limit 10000 µg/L	6/10	SYR4	2012–2017
Total Haloacetic Acids (HAA5)	2.74 µg/L 4.6% of the EPA limit 60 µg/L worst single sample: 2.9 µg/L	6/8	SYR4	2013–2019
Barium	20.18 µg/L 1% of the EPA limit 2000 µg/L worst single sample: 20.4 µg/L	5/5	SYR4	2012–2017
Gross Beta Particle Activity	3.4625 pCi/L No EPA limit set worst single sample: 3.5 pCi/L	4/4	SYR4	2013–2014
Atrazine	0.1100 µg/L 3.7% of the EPA limit 3 µg/L	1/3	SYR4	2014–2017
Bromoform	0.8500 µg/L No EPA limit set	1/16	SYR4	2013–2019
Combined Uranium	0.4500 µg/L 1.5% of the EPA limit 30 µg/L	1/1	SYR4	2012

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, TotalArsenicBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDibromoacetic AcidDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Poynette Waterworks

Is Poynette Waterworks tap water safe to drink?

EPA monitoring detected 18 contaminants in Poynette 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 Poynette Waterworks's water?

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

How many people does Poynette Waterworks serve?

Poynette Waterworks reports serving 2,520 people in Wisconsin, per its EPA record.

Has Poynette Waterworks had any water quality violations?

The EPA has 63 violations on file for Poynette Waterworks, 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.