PlainWater
States → South Dakota

KADOKA

PWS ID: SD4600181 · KADOKA, South Dakota 57543

KADOKA serves 543 people in KADOKA, South Dakota using Surface Water water sources. It has 141 recorded EPA violations, including 40 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: KADOKA

KADOKA is a local-owned community water system that delivers drinking water to 543 residents in KADOKA, South Dakota (Jackson County) through 325 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 141 total violations for this system , of which 40 (28%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 95 monitoring and reporting violations are on file. The most recent violation on record dates to 2005.

The most frequently cited contaminant at this system is Combined Radium (-226 and -228), recorded in 38 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. KADOKA's 141 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
543
Total Violations
141
Health-Based Violations
40
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
325
County
Jackson
School/Daycare
No
MCL Violations
38
Monitoring Violations
95
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 38 2003
Nitrate MR 3 1995
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 2005
Asbestos MR 2 1993
Heptachlor epoxide MR 2 1993
Atrazine MR 2 1993
Methoxychlor MR 2 1993
Di(2-ethylhexyl) adipate MR 2 1993
Endrin MR 2 1993
HEXACHLOROBENZENE MR 2 1993
BHC-GAMMA MR 2 1993
Chlordane MR 2 1993
Toxaphene MR 2 1993
Simazine MR 2 1993
Carbofuran MR 2 1993
Dalapon MR 2 1993
Dinoseb MR 2 1993
Pentachlorophenol MR 2 1993
1,2-DIBROMO-3-CHLOROPROPANE MR 2 1993
Diquat MR 2 1993
Arsenic MR 2 1991
Cadmium MR 2 1991
Chromium MR 2 1991
Mercury MR 2 1991
Antimony, Total MR 2 1991
Total Polychlorinated Biphenyls (PCB) MR 2 1993
Aldicarb sulfoxide MR 2 1993
Nickel MR 2 1991
OXAMYL MR 2 1993
Di(2-ethylhexyl) phthalate 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 KADOKA.

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 SD4600181 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
2005 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 SDWIS / SD4600181 / 0400
2003 Combined Radium (-226 and -228) MCL 38 SDWIS / SD4600181 / 4010
1995 Nitrate MR 3 SDWIS / SD4600181 / 1040
1994 Coliform (TCR) MR 2 SDWIS / SD4600181 / 3100
1993 Asbestos MR 2 SDWIS / SD4600181 / 1094
1993 Heptachlor epoxide MR 2 SDWIS / SD4600181 / 2067
1993 Atrazine MR 2 SDWIS / SD4600181 / 2050
1993 Methoxychlor MR 2 SDWIS / SD4600181 / 2015
1993 Di(2-ethylhexyl) adipate MR 2 SDWIS / SD4600181 / 2035
1993 Endrin MR 2 SDWIS / SD4600181 / 2005
1993 HEXACHLOROBENZENE MR 2 SDWIS / SD4600181 / 2274
1993 BHC-GAMMA MR 2 SDWIS / SD4600181 / 2010
1993 Chlordane MR 2 SDWIS / SD4600181 / 2959
1993 Toxaphene MR 2 SDWIS / SD4600181 / 2020
1993 Simazine MR 2 SDWIS / SD4600181 / 2037

How KADOKA Compares

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

Metric KADOKA South Dakota avg Federal benchmark
Total violations 141 86 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 40 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 543 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 KADOKA water safe to drink? ▼
KADOKA (PWS ID: SD4600181) has 141 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 543 people using Surface Water sources.
How many people does KADOKA serve? ▼
KADOKA serves 543 people in KADOKA, South Dakota. It is a Local-owned system using Surface Water water sources with 325 service connections.
What type of violations does KADOKA have? ▼
KADOKA has 141 total violations: 40 health-based violations (MCL exceedances or treatment failures), 95 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in KADOKA water? ▼
No PFAS testing data is available for KADOKA under the EPA's UCMR5 monitoring program.
What water source does KADOKA use? ▼
KADOKA uses Surface Water 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