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Tap water quality report

Roscoe

EPA monitoring tested this supplier for 21 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

21
contaminants tested
11
detected
269
people served
5
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
SWP
Ownership
Local government
Counties served
Edmunds

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.

5
health-based violations
12
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1995-08-01 → 1995-08-31
MCL Health-based Resolved 1995-08-01 → 1995-08-31
MCL Health-based Resolved 1995-08-01 → 1995-08-31
MCL Health-based Resolved 1991-01-01 → 1991-01-31
MCL Health-based Resolved 1991-01-01 → 1991-01-31
MON Monitoring Archived 2026-02-01 → 2026-02-28
MR Monitoring Archived 2026-01-01 → 2026-03-31
MR Monitoring Resolved 1998-01-01 → 1998-06-30
MR Monitoring Resolved 1998-01-01 → 1998-06-30
MR Monitoring Resolved 1998-01-01 → 1998-06-30

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
Copper
723 µg/L 56%
of the EPA limit 1300 µg/L
worst single sample: 730 µg/L
15/15 SYR4 2012–2018
Lead
2.06 µg/L 14%
of the EPA limit 15 µg/L
worst single sample: 2.2 µg/L
15/15 SYR4 2012–2018
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2024
TTHM
10.281 µg/L 13%
of the EPA limit 80 µg/L
worst single sample: 10.5 µg/L
7/7 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
18.49 µg/L 31%
of the EPA limit 60 µg/L
worst single sample: 18.7 µg/L
7/7 SYR4 2013–2019
Nitrate
400 µg/L 4%
of the EPA limit 10000 µg/L
 2/6 SYR4 2017–2019
Barium
47.8 µg/L 2.4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2012
Chromium
8.4 µg/L 8.4%
of the EPA limit 100 µg/L
 1/1 SYR4 2012
Fluoride
800 µg/L 20%
of the EPA limit 4000 µg/L
 1/1 SYR4 2012
Gross Alpha, Excl. Radon And U
1.6 pCi/L 11%
of the EPA limit 15 pCi/L
 1/1 SYR4 2012
Selenium
3.8 µg/L 7.6%
of the EPA limit 50 µg/L
 1/1 SYR4 2012
10 contaminants tested, none detected
Antimony, TotalArsenicBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityMercuryNitriteThallium, Total

Utility contact

Contact
NATHAN MILLER
Phone
6052874624
Email
[email protected]

Frequently asked questions about Roscoe

Is Roscoe tap water safe to drink?

EPA monitoring detected 11 contaminants in Roscoe'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 Roscoe'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 Roscoe serve?

Roscoe reports serving 269 people in South Dakota, per its EPA record.

Has Roscoe had any water quality violations?

The EPA has 12 violations on file for Roscoe, of which 5 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.