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Community Water System · PWS SD4602027

White Rock Colony

Rosholt, South Dakota 57260 - drinking water served from groundwater sources to 108 people, tracked in EPA SDWIS and UCMR5.

108
People served
523
EPA violations
44
Health-based
Untested
UCMR5 result

The verdict

EPA records 523 drinking-water violations at White Rock Colony, 8% of them health-based - above the South Dakota per-system average.

523
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
108
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: White Rock Colony

White Rock Colony is a private-owned community water system that delivers drinking water to 108 residents in Rosholt, South Dakota (Roberts County) through 12 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 523 total violations for this system , of which 44 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 463 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 50 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%).

White Rock Colony's 523 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
108
Total Violations
523
Health-Based Violations
44
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
12
County
Roberts
School/Daycare
No
MCL Violations
44
Monitoring Violations
463
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 50 2012
Arsenic MCL 39 2008
Nitrate MR 11 2003
Lead and Copper Rule MR 10 2013
Arsenic MR 9 2006
cis-1,2-Dichloroethylene MR 7 2013
1,1,1-Trichloroethane MR 7 2013
1,2,4-Trichlorobenzene MR 7 2013
1,1,2-Trichloroethane MR 7 2013
Xylenes, Total MR 7 2013
1,1-Dichloroethylene MR 7 2013
Carbon tetrachloride MR 7 2013
CHLOROBENZENE MR 7 2013
Styrene MR 7 2013
o-Dichlorobenzene MR 7 2013
1,2-Dichloroethane MR 7 2013
Trichloroethylene MR 7 2013
Toluene MR 7 2013
Tetrachloroethylene MR 7 2013
Ethylbenzene MR 7 2013
trans-1,2-Dichloroethylene MR 7 2013
Benzene MR 7 2013
p-Dichlorobenzene MR 7 2013
1,2-Dichloropropane MR 7 2013
DICHLOROMETHANE MR 7 2013
Vinyl chloride MR 7 2013
LASSO MR 6 2013
Heptachlor epoxide MR 6 2013
Atrazine MR 6 2013
Benzo(a)pyrene MR 6 2013

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 White Rock Colony.

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 SD4602027 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
2018 Revised Total Coliform Rule MON 3 SDWIS / SD4602027 / 8000
2013 Lead and Copper Rule MR 10 SDWIS / SD4602027 / 5000
2013 cis-1,2-Dichloroethylene MR 7 SDWIS / SD4602027 / 2380
2013 1,1,1-Trichloroethane MR 7 SDWIS / SD4602027 / 2981
2013 1,2,4-Trichlorobenzene MR 7 SDWIS / SD4602027 / 2378
2013 1,1,2-Trichloroethane MR 7 SDWIS / SD4602027 / 2985
2013 Xylenes, Total MR 7 SDWIS / SD4602027 / 2955
2013 1,1-Dichloroethylene MR 7 SDWIS / SD4602027 / 2977
2013 Carbon tetrachloride MR 7 SDWIS / SD4602027 / 2982
2013 CHLOROBENZENE MR 7 SDWIS / SD4602027 / 2989
2013 Styrene MR 7 SDWIS / SD4602027 / 2996
2013 o-Dichlorobenzene MR 7 SDWIS / SD4602027 / 2968
2013 1,2-Dichloroethane MR 7 SDWIS / SD4602027 / 2980
2013 Trichloroethylene MR 7 SDWIS / SD4602027 / 2984
2013 Toluene MR 7 SDWIS / SD4602027 / 2991

How White Rock Colony Compares

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

Metric White Rock Colony South Dakota avg Federal benchmark
Total violations 523 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 44 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 108 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 White Rock Colony water safe to drink? ▼
White Rock Colony (PWS ID: SD4602027) has 523 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 108 people using Groundwater sources.
How many people does White Rock Colony serve? ▼
White Rock Colony serves 108 people in Rosholt, South Dakota. It is a Private-owned system using Groundwater water sources with 12 service connections.
What type of violations does White Rock Colony have? ▼
White Rock Colony has 523 total violations: 44 health-based violations (MCL exceedances or treatment failures), 463 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in White Rock Colony water? ▼
No PFAS testing data is available for White Rock Colony under the EPA's UCMR5 monitoring program.
What water source does White Rock Colony use? ▼
White Rock Colony 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.