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Community Water System · PWS SD4602086

Pleasant Valley Colony

Flandreau, South Dakota 57028 - drinking water served from groundwater sources to 107 people, tracked in EPA SDWIS and UCMR5.

107
People served
314
EPA violations
47
Health-based
Untested
UCMR5 result

The verdict

EPA records 314 drinking-water violations at Pleasant Valley Colony, 15% of them health-based - above the South Dakota per-system average.

314
Total EPA violations on record
15%
Health-based (MCL / treatment failure)
107
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Pleasant Valley Colony

Pleasant Valley Colony is a private-owned community water system that delivers drinking water to 107 residents in Flandreau, South Dakota (Moody County) through 19 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 314 total violations for this system , of which 47 (15%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 263 monitoring and reporting violations are on file. The most recent violation on record dates to 2014.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 47 violations (MCL, health-based). 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%).

Pleasant Valley Colony's 314 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
107
Total Violations
314
Health-Based Violations
47
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
19
County
Moody
School/Daycare
No
MCL Violations
47
Monitoring Violations
263
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 47 2013
Coliform (TCR) MR 30 2011
Picloram MR 19 2005
Lead and Copper Rule MR 8 1995
E. COLI MR 4 2014
LASSO MR 4 1993
Benzo(a)pyrene MR 4 1993
Methoxychlor MR 4 1993
Di(2-ethylhexyl) adipate MR 4 1993
Hexachlorocyclopentadiene MR 4 1993
Endrin MR 4 1993
HEXACHLOROBENZENE MR 4 1993
BHC-GAMMA MR 4 1993
Chlordane MR 4 1993
Aldicarb sulfone MR 4 1993
OXAMYL MR 4 1993
Dalapon MR 4 1993
Dinoseb MR 4 1993
Pentachlorophenol MR 4 1993
2,4-D MR 4 1993
Glyphosate MR 4 1993
Aldicarb sulfoxide MR 4 1993
Carbofuran MR 4 1993
Total Polychlorinated Biphenyls (PCB) MR 4 1993
Di(2-ethylhexyl) phthalate MR 4 1993
Simazine MR 4 1993
Endothall MR 4 1993
Atrazine MR 4 1993
Diquat MR 4 1993
Heptachlor epoxide MR 4 1993

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 Pleasant Valley 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 SD4602086 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
2014 E. COLI MR 4 SDWIS / SD4602086 / 3014
2013 Coliform (TCR) MCL 47 SDWIS / SD4602086 / 3100
2013 Vinyl chloride MR 2 SDWIS / SD4602086 / 2976
2013 DICHLOROMETHANE MR 2 SDWIS / SD4602086 / 2964
2013 1,2,4-Trichlorobenzene MR 2 SDWIS / SD4602086 / 2378
2013 1,1,2-Trichloroethane MR 2 SDWIS / SD4602086 / 2985
2013 Xylenes, Total MR 2 SDWIS / SD4602086 / 2955
2013 1,1-Dichloroethylene MR 2 SDWIS / SD4602086 / 2977
2013 CHLOROBENZENE MR 2 SDWIS / SD4602086 / 2989
2013 o-Dichlorobenzene MR 2 SDWIS / SD4602086 / 2968
2013 1,2-Dichloropropane MR 2 SDWIS / SD4602086 / 2983
2013 p-Dichlorobenzene MR 2 SDWIS / SD4602086 / 2969
2013 1,2-Dichloroethane MR 2 SDWIS / SD4602086 / 2980
2013 Toluene MR 2 SDWIS / SD4602086 / 2991
2013 1,1,1-Trichloroethane MR 2 SDWIS / SD4602086 / 2981

How Pleasant Valley Colony Compares

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

Metric Pleasant Valley Colony South Dakota avg Federal benchmark
Total violations 314 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 47 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 107 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 Pleasant Valley Colony water safe to drink? ▼
Pleasant Valley Colony (PWS ID: SD4602086) has 314 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 107 people using Groundwater sources.
How many people does Pleasant Valley Colony serve? ▼
Pleasant Valley Colony serves 107 people in Flandreau, South Dakota. It is a Private-owned system using Groundwater water sources with 19 service connections.
What type of violations does Pleasant Valley Colony have? ▼
Pleasant Valley Colony has 314 total violations: 47 health-based violations (MCL exceedances or treatment failures), 263 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Pleasant Valley Colony water? ▼
No PFAS testing data is available for Pleasant Valley Colony under the EPA's UCMR5 monitoring program.
What water source does Pleasant Valley Colony use? ▼
Pleasant Valley 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.