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Tap water quality report

Riverside Colony

EPA monitoring tested this supplier for 19 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

19
contaminants tested
9
detected
80
people served
10
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Private
Counties served
Beadle

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.

10
health-based violations
426
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1993-10-01 → 1993-10-31
MCL Health-based Resolved 1993-10-01 → 1993-10-31
MCL Health-based Resolved 1993-10-01 → 1993-10-31
MCL Health-based Resolved 1993-09-01 → 1993-09-30
MCL Health-based Resolved 1993-09-01 → 1993-09-30
MCL Health-based Resolved 1993-09-01 → 1993-09-30
MCL Health-based Resolved 1991-06-01 → 1991-06-30
MCL Health-based Resolved 1991-06-01 → 1991-06-30
MCL Health-based Resolved 1991-06-01 → 1991-06-30
MCL Health-based Resolved 1991-06-01 → 1991-06-30

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 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
40 µg/L 3.1%
of the EPA limit 1300 µg/L
 15/15 SYR4 2013–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2025
Lead
0.4000 µg/L 2.7%
of the EPA limit 15 µg/L
 15/15 SYR4 2013–2019
Nitrate
700 µg/L 7%
of the EPA limit 10000 µg/L
 4/4 SYR4 2019
Barium
7.7 µg/L 0.4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2013
Chromium
2.4 µg/L 2.4%
of the EPA limit 100 µg/L
 1/1 SYR4 2013
Fluoride
1900 µg/L 48%
of the EPA limit 4000 µg/L
 1/1 SYR4 2013
Nitrite
60 µg/L 6%
of the EPA limit 1000 µg/L
 1/1 SYR4 2019
Selenium
3.7 µg/L 7.4%
of the EPA limit 50 µg/L
 1/1 SYR4 2013
10 contaminants tested, none detected
Antimony, TotalArsenicBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Alpha, Excl. Radon And UGross Beta Particle ActivityMercuryThallium, Total

Utility contact

Contact
BENJI WALDNER
Phone
6053527462
Email
Benji@rsindust.com

Frequently asked questions about Riverside Colony

Is Riverside Colony tap water safe to drink?

EPA monitoring detected 9 contaminants in Riverside Colony'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 Riverside Colony's water?

EPA monitoring detected Copper, Lead, Lead, Nitrate, Barium, and others. The full list with the level and data source for each is above.

How many people does Riverside Colony serve?

Riverside Colony reports serving 80 people in South Dakota, per its EPA record.

Has Riverside Colony had any water quality violations?

The EPA has 426 violations on file for Riverside Colony, of which 10 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.