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Tap water quality report

Tri-County Rural Water

EPA monitoring tested this supplier for 51 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

51
contaminants tested
13
detected
2,190
people served
51
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Surface water
Ownership
Private
Counties served
Dewey, Meade, Ziebach

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.

51
health-based violations
164
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2009-03-01 → 2009-03-31
TT Health-based Resolved 2009-03-01 → 2009-03-31
TT Health-based Resolved 2009-03-01 → 2009-03-31
TT Health-based Resolved 2008-12-01 → 2008-12-31
TT Health-based Resolved 2008-12-01 → 2008-12-31
TT Health-based Resolved 2008-12-01 → 2008-12-31
TT Health-based Resolved 2006-11-01 → 2006-11-30
TT Health-based Resolved 2006-11-01 → 2006-11-30
TT Health-based Resolved 2006-11-01 → 2006-11-30
MCL Health-based Resolved 2006-04-01 → 2006-06-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
33.98 µg/L 42%
of the EPA limit 80 µg/L
worst single sample: 44.3 µg/L
29/29 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
25.85 µg/L 43%
of the EPA limit 60 µg/L
worst single sample: 37.6 µg/L
24/29 SYR4 2012–2019
Copper
82 µg/L 6.3%
of the EPA limit 1300 µg/L
worst single sample: 120 µg/L
20/20 SYR4 2014–2017
Lead
3.63 µg/L 24%
of the EPA limit 15 µg/L
worst single sample: 4.2 µg/L
20/20 SYR4 2014–2017
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2023
Lithium
64.8 µg/L
No EPA limit set
 3/3 UCMR-5 2025
Fluoride
504.5 µg/L 13%
of the EPA limit 4000 µg/L
worst single sample: 510 µg/L
2/2 SYR4 2017–2018
Antimony, Total
0.3000 µg/L 5%
of the EPA limit 6 µg/L
 1/1 SYR4 2018
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 1/1 SYR4 2018
Barium
39.3 µg/L 2%
of the EPA limit 2000 µg/L
 1/1 SYR4 2018
Chromium
1.5 µg/L 1.5%
of the EPA limit 100 µg/L
 1/1 SYR4 2018
Gross Alpha, Excl. Radon And U
3.1 pCi/L 21%
of the EPA limit 15 pCi/L
 1/1 SYR4 2015
Selenium
0.6700 µg/L 1.3%
of the EPA limit 50 µg/L
 1/1 SYR4 2018
38 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityHfpo-DaMercuryNetfosaaNfdhaNmefosaaNitrateNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaThallium, Total

Utility contact

Contact
LEO FISCHER
Phone
6059647766
Email
[email protected]

Frequently asked questions about Tri-County Rural Water

Is Tri-County Rural Water tap water safe to drink?

EPA monitoring detected 13 contaminants in Tri-County 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 Tri-County Rural Water's water?

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

How many people does Tri-County Rural Water serve?

Tri-County Rural Water reports serving 2,190 people in South Dakota, per its EPA record.

Has Tri-County Rural Water had any water quality violations?

The EPA has 164 violations on file for Tri-County Rural Water, of which 51 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.