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Community Water System · PWS SD4602095

Deberg Well Users Association

Spearfish, South Dakota 57783 - drinking water served from groundwater sources to 54 people, tracked in EPA SDWIS and UCMR5.

54
People served
52
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 52 drinking-water violations at Deberg Well Users Association, 10% of them health-based - below the South Dakota per-system average.

52
Total EPA violations on record
10%
Health-based (MCL / treatment failure)
54
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Deberg Well Users Association

Deberg Well Users Association is a private-owned community water system that delivers drinking water to 54 residents in Spearfish, South Dakota (Lawrence County) through 24 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 52 total violations for this system , of which 5 (10%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 47 monitoring and reporting violations are on file. The most recent violation on record dates to 2015.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 3 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%).

Deberg Well Users Association's 52 violations sit below 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
54
Total Violations
52
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
24
County
Lawrence
School/Daycare
No
MCL Violations
3
Monitoring Violations
47
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 3 1993
Lead and Copper Rule MR 3 1998
cis-1,2-Dichloroethylene MR 2 1993
1,1,1-Trichloroethane MR 2 1993
Ethylbenzene MR 2 1993
DICHLOROMETHANE MR 2 1993
1,2,4-Trichlorobenzene MR 2 1993
1,1,2-Trichloroethane MR 2 1993
Xylenes, Total MR 2 1993
CHLOROBENZENE MR 2 1993
o-Dichlorobenzene MR 2 1993
1,2-Dichloropropane MR 2 1993
Benzene MR 2 1993
1,2-Dichloroethane MR 2 1993
Toluene MR 2 1993
Tetrachloroethylene MR 2 1993
Trichloroethylene MR 2 1993
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 2015
trans-1,2-Dichloroethylene MR 2 1993
Carbon tetrachloride MR 2 1993
1,1-Dichloroethylene MR 2 1993
Styrene MR 2 1993
Asbestos MR 2 1993
p-Dichlorobenzene MR 2 1993
Vinyl chloride 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 Deberg Well Users Association.

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 SD4602095 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
2015 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 SDWIS / SD4602095 / 0400
1998 Lead and Copper Rule MR 3 SDWIS / SD4602095 / 5000
1993 Coliform (TCR) MCL 3 SDWIS / SD4602095 / 3100
1993 cis-1,2-Dichloroethylene MR 2 SDWIS / SD4602095 / 2380
1993 1,1,1-Trichloroethane MR 2 SDWIS / SD4602095 / 2981
1993 Ethylbenzene MR 2 SDWIS / SD4602095 / 2992
1993 DICHLOROMETHANE MR 2 SDWIS / SD4602095 / 2964
1993 1,2,4-Trichlorobenzene MR 2 SDWIS / SD4602095 / 2378
1993 1,1,2-Trichloroethane MR 2 SDWIS / SD4602095 / 2985
1993 Xylenes, Total MR 2 SDWIS / SD4602095 / 2955
1993 CHLOROBENZENE MR 2 SDWIS / SD4602095 / 2989
1993 o-Dichlorobenzene MR 2 SDWIS / SD4602095 / 2968
1993 1,2-Dichloropropane MR 2 SDWIS / SD4602095 / 2983
1993 Benzene MR 2 SDWIS / SD4602095 / 2990
1993 1,2-Dichloroethane MR 2 SDWIS / SD4602095 / 2980

How Deberg Well Users Association Compares

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

Metric Deberg Well Users Association South Dakota avg Federal benchmark
Total violations 52 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 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 54 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 Deberg Well Users Association water safe to drink? ▼
Deberg Well Users Association (PWS ID: SD4602095) has 52 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 54 people using Groundwater sources.
How many people does Deberg Well Users Association serve? ▼
Deberg Well Users Association serves 54 people in Spearfish, South Dakota. It is a Private-owned system using Groundwater water sources with 24 service connections.
What type of violations does Deberg Well Users Association have? ▼
Deberg Well Users Association has 52 total violations: 5 health-based violations (MCL exceedances or treatment failures), 47 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Deberg Well Users Association water? ▼
No PFAS testing data is available for Deberg Well Users Association under the EPA's UCMR5 monitoring program.
What water source does Deberg Well Users Association use? ▼
Deberg Well Users Association 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.