Tap WaterIndex

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Tap water quality report

Corona

EPA monitoring tested this supplier for 21 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

21
contaminants tested
10
detected
69
people served
0
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
GWP
Ownership
Local government
Counties served
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
106
violations on file
1
still open
ViolationTypeStatusPeriod
MON Monitoring Archived 2025-12-01 → 2025-12-31
Other Monitoring Unaddressed 2025-07-01
MR Monitoring Resolved 2023-10-01
MR Monitoring Resolved 2023-10-01
MR Monitoring Resolved 2023-08-01 → 2023-09-30
MR Monitoring Resolved 2023-08-01 → 2023-09-30
MR Monitoring Resolved 2023-08-01 → 2023-09-30
MR Monitoring Resolved 2023-08-01 → 2023-09-30
MON Monitoring Resolved 2017-05-01 → 2017-05-31
MON Monitoring Resolved 2017-05-01 → 2017-05-31

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
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
Copper
140 µg/L 11%
of the EPA limit 1300 µg/L
 10/10 SYR4 2014–2017
Lead
1.8 µg/L 12%
of the EPA limit 15 µg/L
 10/10 SYR4 2014–2017
TTHM
22.1 µg/L 28%
of the EPA limit 80 µg/L
 3/3 SYR4 2013–2017
Total Haloacetic Acids (HAA5)
12.2 µg/L 20%
of the EPA limit 60 µg/L
 2/3 SYR4 2013–2017
Barium
10.4 µg/L 0.5%
of the EPA limit 2000 µg/L
 1/1 SYR4 2019
Chromium
1.74 µg/L 1.7%
of the EPA limit 100 µg/L
 1/1 SYR4 2019
Fluoride
600 µg/L 15%
of the EPA limit 4000 µg/L
 1/1 SYR4 2019
Gross Alpha, Excl. Radon And U
6.7 pCi/L 45%
of the EPA limit 15 pCi/L
 1/1 SYR4 2014
Selenium
0.6600 µg/L 1.3%
of the EPA limit 50 µg/L
 1/1 SYR4 2019
11 contaminants tested, none detected
Antimony, TotalArsenicBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityMercuryNitrateNitriteThallium, Total

Utility contact

Contact
DON SETTJE
Email
wboy19h20@gmail.com

Frequently asked questions about Corona

Is Corona tap water safe to drink?

EPA monitoring detected 10 contaminants in Corona'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 Corona's water?

EPA monitoring detected Lead, Copper, 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 Corona serve?

Corona reports serving 69 people in South Dakota, per its EPA record.

Has Corona had any water quality violations?

The EPA has 106 violations on file for Corona, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.