Is Clay Rws/South Union Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Union

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

331

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30
MR	Monitoring	Resolved	2004-04-01 → 2004-06-30

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	647.5 µg/L 50% of the EPA limit 1300 µg/L worst single sample: 980 µg/L	30/30	SYR4	2013–2019
Lead	4.255 µg/L 28% of the EPA limit 15 µg/L worst single sample: 7.4 µg/L	30/30	SYR4	2013–2019
Lead	0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L	12/12	LCR	2025
TTHM	18.32 µg/L 23% of the EPA limit 80 µg/L worst single sample: 18.6 µg/L	8/8	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	5.217 µg/L 8.7% of the EPA limit 60 µg/L worst single sample: 5.37 µg/L	7/8	SYR4	2013–2019
Arsenic	2 µg/L 20% of the EPA limit 10 µg/L	1/1	SYR4	2013
Barium	3.5 µg/L 0.2% of the EPA limit 2000 µg/L	1/1	SYR4	2013
Chromium	3.8 µg/L 3.8% of the EPA limit 100 µg/L	1/1	SYR4	2013
Selenium	0.6000 µg/L 1.2% of the EPA limit 50 µg/L	1/1	SYR4	2013

11 contaminants tested, none detected

Antimony, TotalBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Alpha, Excl. Radon And UGross Beta Particle ActivityMercuryNitrateNitriteThallium, Total

Utility contact

Contact: ROB GANSCHOW
Phone: 6052672088
Email: [email protected]

Frequently asked questions about Clay Rws/South Union

Is Clay Rws/South Union tap water safe to drink?

EPA monitoring detected 9 contaminants in Clay Rws/South Union'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 Clay Rws/South Union's water?

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

How many people does Clay Rws/South Union serve?

Clay Rws/South Union reports serving 1,447 people in South Dakota, per its EPA record.

Has Clay Rws/South Union had any water quality violations?

The EPA has 331 violations on file for Clay Rws/South Union, of which 0 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.