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CLEARFIELD COLONY

PWS ID: SD4602020 · DELMONT, South Dakota 57330

CLEARFIELD COLONY serves 120 people in DELMONT, South Dakota using Groundwater water sources. It has 132 recorded EPA violations, including 27 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CLEARFIELD COLONY

CLEARFIELD COLONY is a private-owned community water system that delivers drinking water to 120 residents in DELMONT, South Dakota (Douglas County) through 22 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 132 total violations for this system , of which 27 (20%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 97 monitoring and reporting violations are on file. The most recent violation on record dates to 2011.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 27 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. CLEARFIELD COLONY's 132 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
120
Total Violations
132
Health-Based Violations
27
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
22
County
Douglas
School/Daycare
No
MCL Violations
27
Monitoring Violations
97
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 27 2011
Coliform (TCR) MR 19 2004
Lead and Copper Rule MR 13 1997
Barium MR 3 1990
Cadmium MR 3 1990
Chromium MR 3 1990
Fluoride MR 3 1990
Mercury MR 3 1990
Selenium MR 3 1990
Arsenic MR 3 1990
Nitrate MR 2 1993
cis-1,2-Dichloroethylene MR 2 1993
1,1,1-Trichloroethane MR 2 1993
Tetrachloroethylene MR 2 1993
DICHLOROMETHANE MR 2 1993
1,2,4-Trichlorobenzene MR 2 1993
Xylenes, Total MR 2 1993
1,1-Dichloroethylene MR 2 1993
Carbon tetrachloride MR 2 1993
Styrene MR 2 1993
Benzene MR 2 1993
p-Dichlorobenzene MR 2 1993
1,2-Dichloroethane MR 2 1993
Trichloroethylene MR 2 1993
Toluene MR 2 1993
1,2-Dichloropropane MR 2 1993
Vinyl chloride MR 2 1993
trans-1,2-Dichloroethylene MR 2 1993
1,1,2-Trichloroethane MR 2 1993
Ethylbenzene MR 2 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 CLEARFIELD 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 SD4602020 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
2011 Coliform (TCR) MCL 27 SDWIS / SD4602020 / 3100
2004 Coliform (TCR) MR 19 SDWIS / SD4602020 / 3100
1997 Lead and Copper Rule MR 13 SDWIS / SD4602020 / 5000
1997 Lead and Copper Rule Other 1 SDWIS / SD4602020 / 5000
1993 Nitrate MR 2 SDWIS / SD4602020 / 1040
1993 cis-1,2-Dichloroethylene MR 2 SDWIS / SD4602020 / 2380
1993 1,1,1-Trichloroethane MR 2 SDWIS / SD4602020 / 2981
1993 Tetrachloroethylene MR 2 SDWIS / SD4602020 / 2987
1993 DICHLOROMETHANE MR 2 SDWIS / SD4602020 / 2964
1993 1,2,4-Trichlorobenzene MR 2 SDWIS / SD4602020 / 2378
1993 Xylenes, Total MR 2 SDWIS / SD4602020 / 2955
1993 1,1-Dichloroethylene MR 2 SDWIS / SD4602020 / 2977
1993 Carbon tetrachloride MR 2 SDWIS / SD4602020 / 2982
1993 Styrene MR 2 SDWIS / SD4602020 / 2996
1993 Benzene MR 2 SDWIS / SD4602020 / 2990

How CLEARFIELD COLONY Compares

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

Metric CLEARFIELD COLONY South Dakota avg Federal benchmark
Total violations 132 86 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 27 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 120 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 CLEARFIELD COLONY water safe to drink? ▼
CLEARFIELD COLONY (PWS ID: SD4602020) has 132 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 120 people using Groundwater sources.
How many people does CLEARFIELD COLONY serve? ▼
CLEARFIELD COLONY serves 120 people in DELMONT, South Dakota. It is a Private-owned system using Groundwater water sources with 22 service connections.
What type of violations does CLEARFIELD COLONY have? ▼
CLEARFIELD COLONY has 132 total violations: 27 health-based violations (MCL exceedances or treatment failures), 97 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CLEARFIELD COLONY water? ▼
No PFAS testing data is available for CLEARFIELD COLONY under the EPA's UCMR5 monitoring program.
What water source does CLEARFIELD COLONY use? ▼
CLEARFIELD 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.

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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.

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