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Community Water System · PWS SD4600116

Elk Point

Elk Point, South Dakota 57025 - drinking water served from groundwater sources to 2,124 people, tracked in EPA SDWIS and UCMR5.

2,124
People served
87
EPA violations
3
Health-based
Untested
UCMR5 result

The verdict

EPA records 87 drinking-water violations at Elk Point, 3% of them health-based - above the South Dakota per-system average.

87
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
2,124
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Elk Point

Elk Point is a local-owned community water system that delivers drinking water to 2,124 residents in Elk Point, South Dakota (Union County) through 897 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 87 total violations for this system , of which 3 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 80 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 12 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. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%).

Elk Point's 87 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
2,124
Total Violations
87
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
897
County
Union
School/Daycare
No
MCL Violations
3
Monitoring Violations
80
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 12 2008
Nitrate MR 6 2008
Coliform (TCR) MCL 3 2005
Consumer Confidence Rule Other 2 2004
LASSO MR 2 2011
Heptachlor MR 2 2011
Heptachlor epoxide MR 2 2011
Atrazine MR 2 2011
Benzo(a)pyrene MR 2 2011
Methoxychlor MR 2 2011
Total Polychlorinated Biphenyls (PCB) MR 2 2011
Di(2-ethylhexyl) phthalate MR 2 2011
HEXACHLOROBENZENE MR 2 2011
BHC-GAMMA MR 2 2011
Chlordane MR 2 2011
Simazine MR 2 2011
Dinoseb MR 2 2011
2,4,5-TP MR 2 2011
Picloram MR 2 2011
Endothall MR 2 2011
Glyphosate MR 2 2011
OXAMYL MR 2 2011
Hexachlorocyclopentadiene MR 2 2011
Carbofuran MR 2 2011
Toxaphene MR 2 2011
2,4-D MR 2 2011
Di(2-ethylhexyl) adipate MR 2 2011
Dalapon MR 2 2011
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2011
Lead and Copper Rule MR 2 1994

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 Elk Point.

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 SD4600116 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 LASSO MR 2 SDWIS / SD4600116 / 2051
2011 Heptachlor MR 2 SDWIS / SD4600116 / 2065
2011 Heptachlor epoxide MR 2 SDWIS / SD4600116 / 2067
2011 Atrazine MR 2 SDWIS / SD4600116 / 2050
2011 Benzo(a)pyrene MR 2 SDWIS / SD4600116 / 2306
2011 Methoxychlor MR 2 SDWIS / SD4600116 / 2015
2011 Total Polychlorinated Biphenyls (PCB) MR 2 SDWIS / SD4600116 / 2383
2011 Di(2-ethylhexyl) phthalate MR 2 SDWIS / SD4600116 / 2039
2011 HEXACHLOROBENZENE MR 2 SDWIS / SD4600116 / 2274
2011 BHC-GAMMA MR 2 SDWIS / SD4600116 / 2010
2011 Chlordane MR 2 SDWIS / SD4600116 / 2959
2011 Simazine MR 2 SDWIS / SD4600116 / 2037
2011 Dinoseb MR 2 SDWIS / SD4600116 / 2041
2011 2,4,5-TP MR 2 SDWIS / SD4600116 / 2110
2011 Picloram MR 2 SDWIS / SD4600116 / 2040

How Elk Point Compares

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

Metric Elk Point South Dakota avg Federal benchmark
Total violations 87 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 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 2,124 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 Elk Point water safe to drink? ▼
Elk Point (PWS ID: SD4600116) has 87 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,124 people using Groundwater sources.
How many people does Elk Point serve? ▼
Elk Point serves 2,124 people in Elk Point, South Dakota. It is a Local-owned system using Groundwater water sources with 897 service connections.
What type of violations does Elk Point have? ▼
Elk Point has 87 total violations: 3 health-based violations (MCL exceedances or treatment failures), 80 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Elk Point water? ▼
No PFAS testing data is available for Elk Point under the EPA's UCMR5 monitoring program.
What water source does Elk Point use? ▼
Elk Point 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.