PlainWater
States → South Dakota

COLLINS COLONY

PWS ID: SD4602358 · IROQUOIS, South Dakota 57353

COLLINS COLONY serves 95 people in IROQUOIS, South Dakota using Groundwater water sources. It has 106 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: COLLINS COLONY

COLLINS COLONY is a private-owned community water system that delivers drinking water to 95 residents in IROQUOIS, South Dakota (Clark County) through 24 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 106 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 106 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is cis-1,2-Dichloroethylene, recorded in 2 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. COLLINS COLONY's 106 violations sit above the South Dakota average. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%). 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
95
Total Violations
106
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
24
County
Clark
School/Daycare
No
MCL Violations
0
Monitoring Violations
106
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
cis-1,2-Dichloroethylene MR 2 2019
1,1,1-Trichloroethane MR 2 2019
Tetrachloroethylene MR 2 2019
Ethylbenzene MR 2 2019
DICHLOROMETHANE MR 2 2019
Carbon tetrachloride MR 2 2019
CHLOROBENZENE MR 2 2019
trans-1,2-Dichloroethylene MR 2 2019
1,2-Dichloropropane MR 2 2019
1,2-Dichloroethane MR 2 2019
Toluene MR 2 2019
LASSO MR 2 2019
Atrazine MR 2 2019
Total Polychlorinated Biphenyls (PCB) MR 2 2019
Di(2-ethylhexyl) adipate MR 2 2019
Hexachlorocyclopentadiene MR 2 2019
Chlordane MR 2 2019
Toxaphene MR 2 2019
Simazine MR 2 2019
Carbofuran MR 2 2019
Dalapon MR 2 2019
2,4,5-TP MR 2 2019
Pentachlorophenol MR 2 2019
2,4-D MR 2 2019
Endothall MR 2 2019
Glyphosate MR 2 2019
Diquat MR 2 2019
Combined Radium (-226 and -228) MR 2 2022
Combined Uranium MR 2 2022
1,2,4-Trichlorobenzene MR 2 2019

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 COLLINS 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 SD4602358 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
2022 Combined Radium (-226 and -228) MR 2 SDWIS / SD4602358 / 4010
2022 Combined Uranium MR 2 SDWIS / SD4602358 / 4006
2022 Gross Alpha, Excl. Radon and U MR 2 SDWIS / SD4602358 / 4000
2019 cis-1,2-Dichloroethylene MR 2 SDWIS / SD4602358 / 2380
2019 1,1,1-Trichloroethane MR 2 SDWIS / SD4602358 / 2981
2019 Tetrachloroethylene MR 2 SDWIS / SD4602358 / 2987
2019 Ethylbenzene MR 2 SDWIS / SD4602358 / 2992
2019 DICHLOROMETHANE MR 2 SDWIS / SD4602358 / 2964
2019 Carbon tetrachloride MR 2 SDWIS / SD4602358 / 2982
2019 CHLOROBENZENE MR 2 SDWIS / SD4602358 / 2989
2019 trans-1,2-Dichloroethylene MR 2 SDWIS / SD4602358 / 2979
2019 1,2-Dichloropropane MR 2 SDWIS / SD4602358 / 2983
2019 1,2-Dichloroethane MR 2 SDWIS / SD4602358 / 2980
2019 Toluene MR 2 SDWIS / SD4602358 / 2991
2019 LASSO MR 2 SDWIS / SD4602358 / 2051

How COLLINS COLONY Compares

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

Metric COLLINS COLONY South Dakota avg Federal benchmark
Total violations 106 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 95 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is COLLINS COLONY water safe to drink? ▼
COLLINS COLONY (PWS ID: SD4602358) has 106 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 95 people using Groundwater sources.
How many people does COLLINS COLONY serve? ▼
COLLINS COLONY serves 95 people in IROQUOIS, South Dakota. It is a Private-owned system using Groundwater water sources with 24 service connections.
What type of violations does COLLINS COLONY have? ▼
COLLINS COLONY has 106 total violations: 0 health-based violations (MCL exceedances or treatment failures), 106 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in COLLINS COLONY water? ▼
No PFAS testing data is available for COLLINS COLONY under the EPA's UCMR5 monitoring program.
What water source does COLLINS COLONY use? ▼
COLLINS 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.

Explore PlainWater

Water in South Dakota

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for South Dakota

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
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.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial