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Community Water System · PWS SD4600009

Corona

Corona, South Dakota 57227 - drinking water served from groundwater sources to 69 people, tracked in EPA SDWIS and UCMR5.

69
People served
115
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 115 drinking-water violations at Corona - above the South Dakota per-system average.

115
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
69
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Corona

Corona is a local-owned community water system that delivers drinking water to 69 residents in Corona, South Dakota (Roberts County) through 55 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 115 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 101 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 24 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across South Dakota, EPA tracks 654 public water systems serving 915,901 people, with 56,254 cumulative violations and 8,399 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 86 violations. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%).

Corona's 115 violations sit above the South Dakota average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
69
Total Violations
115
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
55
County
Roberts
School/Daycare
No
MCL Violations
0
Monitoring Violations
101
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 24 2023
Chlorine MR 11 2017
Coliform (TCR) MR 6 1996
Nitrate MR 5 1997
Revised Total Coliform Rule MON 3 2017
Gross Alpha, Excl. Radon and U MR 3 1991
Combined Radium (-226 and -228) MR 3 1991
TTHM MR 2 2023
Vinyl chloride MR 2 1994
1,1,1-Trichloroethane MR 2 1994
Ethylbenzene MR 2 1994
DICHLOROMETHANE MR 2 1994
1,1-Dichloroethylene MR 2 1994
Carbon tetrachloride MR 2 1994
CHLOROBENZENE MR 2 1994
Styrene MR 2 1994
1,2-Dichloropropane MR 2 1994
Benzene MR 2 1994
1,2-Dichloroethane MR 2 1994
Toluene MR 2 1994
Tetrachloroethylene MR 2 1994
1,2,4-Trichlorobenzene MR 2 1994
1,1,2-Trichloroethane MR 2 1994
Xylenes, Total MR 2 1994
Trichloroethylene MR 2 1994
cis-1,2-Dichloroethylene MR 2 1994
Total Haloacetic Acids (HAA5) MR 2 2023
trans-1,2-Dichloroethylene MR 2 1994
p-Dichlorobenzene MR 2 1994
o-Dichlorobenzene MR 2 1994

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Corona.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID SD4600009 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

South Dakota Drinking Water Authority

South Dakota's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find SD regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 Consumer Confidence Rule Other 1 SDWIS / SD4600009 / 7000
2023 Lead and Copper Rule MR 24 SDWIS / SD4600009 / 5000
2023 TTHM MR 2 SDWIS / SD4600009 / 2950
2023 Total Haloacetic Acids (HAA5) MR 2 SDWIS / SD4600009 / 2456
2017 Chlorine MR 11 SDWIS / SD4600009 / 0999
2017 Revised Total Coliform Rule MON 3 SDWIS / SD4600009 / 8000
1997 Nitrate MR 5 SDWIS / SD4600009 / 1040
1996 Coliform (TCR) MR 6 SDWIS / SD4600009 / 3100
1994 Vinyl chloride MR 2 SDWIS / SD4600009 / 2976
1994 1,1,1-Trichloroethane MR 2 SDWIS / SD4600009 / 2981
1994 Ethylbenzene MR 2 SDWIS / SD4600009 / 2992
1994 DICHLOROMETHANE MR 2 SDWIS / SD4600009 / 2964
1994 1,1-Dichloroethylene MR 2 SDWIS / SD4600009 / 2977
1994 Carbon tetrachloride MR 2 SDWIS / SD4600009 / 2982
1994 CHLOROBENZENE MR 2 SDWIS / SD4600009 / 2989

How Corona Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Corona South Dakota avg Federal benchmark
Total violations 115 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 12.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 85.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 69 1,400 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 654 regulated public water systems in South Dakota.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Corona water safe to drink? ▼
Corona (PWS ID: SD4600009) has 115 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 69 people using Groundwater sources.
How many people does Corona serve? ▼
Corona serves 69 people in Corona, South Dakota. It is a Local-owned system using Groundwater water sources with 55 service connections.
What type of violations does Corona have? ▼
Corona has 115 total violations: 0 health-based violations (MCL exceedances or treatment failures), 101 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Corona water? ▼
No PFAS testing data is available for Corona under the EPA's UCMR5 monitoring program.
What water source does Corona use? ▼
Corona uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.