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Tap water quality report

Clay Rural Water

EPA monitoring tested this supplier for 50 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

50
contaminants tested
10
detected
4,780
people served
3
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Private
Counties served
Clay, 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.

3
health-based violations
10
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2002-08-01 → 2002-08-31
MCL Health-based Resolved 2002-08-01 → 2002-08-31
MCL Health-based Resolved 2002-08-01 → 2002-08-31
MR Monitoring Resolved 2003-09-01 → 2003-09-30
MR Monitoring Resolved 2003-09-01 → 2003-09-30
MR Monitoring Resolved 1999-01-01 → 2000-09-12
MR Monitoring Resolved 1999-01-01 → 2000-09-12
MR Monitoring Resolved 1999-01-01 → 2000-09-12
MR Monitoring Archived 1976-06-01 → 1980-05-31
MR Monitoring Archived 1976-06-01 → 1980-05-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
350 µg/L 27%
of the EPA limit 1300 µg/L
 60/60 SYR4 2012–2018
Lead
2.7 µg/L 18%
of the EPA limit 15 µg/L
 60/60 SYR4 2012–2018
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
TTHM
50.2 µg/L 63%
of the EPA limit 80 µg/L
 9/9 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
8.99 µg/L 15%
of the EPA limit 60 µg/L
 9/9 SYR4 2012–2019
Lithium
52.5 µg/L
No EPA limit set
 2/2 UCMR-5 2025
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 1/1 SYR4 2012
Barium
3.7 µg/L 0.2%
of the EPA limit 2000 µg/L
 1/1 SYR4 2012
Chromium
1.4 µg/L 1.4%
of the EPA limit 100 µg/L
 1/1 SYR4 2012
Selenium
0.9000 µg/L 1.8%
of the EPA limit 50 µg/L
 1/1 SYR4 2012
40 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Alpha, Excl. Radon And UGross Beta Particle ActivityHfpo-DaMercuryNetfosaaNfdhaNmefosaaNitrateNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaThallium, Total

Utility contact

Contact
ROB GANSCHOW
Phone
6052672088
Email
clayruralwaterrg@gmail.com

Frequently asked questions about Clay Rural Water

Is Clay Rural Water tap water safe to drink?

EPA monitoring detected 10 contaminants in Clay Rural Water'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 Rural Water'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 Rural Water serve?

Clay Rural Water reports serving 4,780 people in South Dakota, per its EPA record.

Has Clay Rural Water had any water quality violations?

The EPA has 10 violations on file for Clay Rural Water, 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.