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Tap water quality report

Grant-Roberts Rural Water

EPA monitoring tested this supplier for 50 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

50
contaminants tested
11
detected
5,050
people served
0
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Private
Counties served
Codington, Grant, Roberts

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.

0
health-based violations
7
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2022-01-01 → 2022-12-31
MR Monitoring Resolved 2022-01-01 → 2022-12-31
MR Monitoring Resolved 2015-01-11
MR Monitoring Resolved 2015-01-11
MR Monitoring Resolved 1998-07-01 → 1998-12-31
MR Monitoring Resolved 1998-07-01 → 1998-12-31
MR Monitoring Resolved 1998-07-01 → 1998-12-31

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
1050 µg/L 81%
of the EPA limit 1300 µg/L
 60/60 SYR4 2013–2019
Lead
19.5 µg/L 130%
of the EPA limit, in the worst sample — 15 µg/L
 60/60 SYR4 2013–2019
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
TTHM
30.1 µg/L 38%
of the EPA limit 80 µg/L
 8/8 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
14.1 µg/L 24%
of the EPA limit 60 µg/L
 7/8 SYR4 2013–2019
Lithium
55.7 µg/L
No EPA limit set
 2/2 UCMR-5 2023
Arsenic
4 µg/L 40%
of the EPA limit 10 µg/L
 1/1 SYR4 2013
Barium
65.5 µg/L 3.3%
of the EPA limit 2000 µg/L
 1/1 SYR4 2013
Chromium
8.2 µg/L 8.2%
of the EPA limit 100 µg/L
 1/1 SYR4 2013
Nitrite
60 µg/L 6%
of the EPA limit 1000 µg/L
 1/1 SYR4 2017
Selenium
0.9000 µg/L 1.8%
of the EPA limit 50 µg/L
 1/1 SYR4 2013
39 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-DaMercuryNetfosaaNfdhaNmefosaaNitratePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaThallium, Total

Utility contact

Contact
BRENT HOFFMANN
Phone
6054326793
Email
manager@grrws.com

Frequently asked questions about Grant-Roberts Rural Water

Is Grant-Roberts Rural Water tap water safe to drink?

EPA monitoring detected 11 contaminants in Grant-Roberts 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 Grant-Roberts 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 Grant-Roberts Rural Water serve?

Grant-Roberts Rural Water reports serving 5,050 people in South Dakota, per its EPA record.

Has Grant-Roberts Rural Water had any water quality violations?

The EPA has 7 violations on file for Grant-Roberts Rural Water, 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.