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Community Water System · PWS SD4600870

South Lincoln Rural Water System

Beresford, South Dakota 57004 - drinking water served from groundwater sources to 5,250 people, tracked in EPA SDWIS and UCMR5.

5,250
People served
66
EPA violations
0
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 66 drinking-water violations at South Lincoln Rural Water System - below the South Dakota per-system average.

66
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
5,250
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: South Lincoln Rural Water System

South Lincoln Rural Water System is a private-owned community water system that delivers drinking water to 5,250 residents in Beresford, South Dakota (Lincoln County) through 2,100 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 66 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 64 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Chlorine, recorded in 3 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

South Lincoln Rural Water System's 66 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
5,250
Total Violations
66
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
2,100
County
Lincoln
School/Daycare
No
MCL Violations
0
Monitoring Violations
64
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 3 2021
Revised Total Coliform Rule MON 3 2023
Heptachlor epoxide MR 2 2014
Benzo(a)pyrene MR 2 2014
Total Polychlorinated Biphenyls (PCB) MR 2 2014
Hexachlorocyclopentadiene MR 2 2014
Endrin MR 2 2014
BHC-GAMMA MR 2 2014
Chlordane MR 2 2014
Toxaphene MR 2 2014
OXAMYL MR 2 2014
Dalapon MR 2 2014
Pentachlorophenol MR 2 2014
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2014
Endothall MR 2 2014
Glyphosate MR 2 2014
LASSO MR 2 2014
2,4-D MR 2 2014
Di(2-ethylhexyl) phthalate MR 2 2014
Diquat MR 2 2014
Heptachlor MR 2 2014
Dinoseb MR 2 2014
ETHYLENE DIBROMIDE MR 2 2014
Methoxychlor MR 2 2014
HEXACHLOROBENZENE MR 2 2014
2,4,5-TP MR 2 2014
Di(2-ethylhexyl) adipate MR 2 2014
Carbofuran MR 2 2014
Picloram MR 2 2014
Atrazine MR 2 2014

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
PFMPA 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFTA 7/22/2024 <8.00 ppt 8.00 ppt Not Detected
PFMBA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 7/22/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 7/22/2024 <6.00 ppt 6.00 ppt Not Detected
PFBS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 7/22/2024 <20.00 ppt 20.00 ppt Not Detected
PFHxA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeS 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFEESA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFBA 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
ADONA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 7/22/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
PFUnA 7/22/2024 <2.00 ppt 2.00 ppt Not Detected
PFDoA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 7/22/2024 <2.00 ppt 2.00 ppt Not Detected
HFPO-DA 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 7/22/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFUnA 7/22/2024 <2.00 ppt 2.00 ppt Not Detected
PFDA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
ADONA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 7/22/2024 <4.00 ppt 4.00 ppt Not Detected

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 South Lincoln Rural Water System.

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 SD4600870 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
2023 Revised Total Coliform Rule MON 3 SDWIS / SD4600870 / 8000
2021 Chlorine MR 3 SDWIS / SD4600870 / 0999
2014 Heptachlor epoxide MR 2 SDWIS / SD4600870 / 2067
2014 Benzo(a)pyrene MR 2 SDWIS / SD4600870 / 2306
2014 Total Polychlorinated Biphenyls (PCB) MR 2 SDWIS / SD4600870 / 2383
2014 Hexachlorocyclopentadiene MR 2 SDWIS / SD4600870 / 2042
2014 Endrin MR 2 SDWIS / SD4600870 / 2005
2014 BHC-GAMMA MR 2 SDWIS / SD4600870 / 2010
2014 Chlordane MR 2 SDWIS / SD4600870 / 2959
2014 Toxaphene MR 2 SDWIS / SD4600870 / 2020
2014 OXAMYL MR 2 SDWIS / SD4600870 / 2036
2014 Dalapon MR 2 SDWIS / SD4600870 / 2031
2014 Pentachlorophenol MR 2 SDWIS / SD4600870 / 2326
2014 1,2-DIBROMO-3-CHLOROPROPANE MR 2 SDWIS / SD4600870 / 2931
2014 Endothall MR 2 SDWIS / SD4600870 / 2033

How South Lincoln Rural Water System Compares

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

Metric South Lincoln Rural Water System South Dakota avg Federal benchmark
Total violations 66 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 5,250 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 South Lincoln Rural Water System water safe to drink?
South Lincoln Rural Water System (PWS ID: SD4600870) has 66 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 5,250 people using Groundwater sources.
How many people does South Lincoln Rural Water System serve?
South Lincoln Rural Water System serves 5,250 people in Beresford, South Dakota. It is a Private-owned system using Groundwater water sources with 2,100 service connections.
What type of violations does South Lincoln Rural Water System have?
South Lincoln Rural Water System has 66 total violations: 0 health-based violations (MCL exceedances or treatment failures), 64 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in South Lincoln Rural Water System water?
No. South Lincoln Rural Water System was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does South Lincoln Rural Water System use?
South Lincoln Rural Water System 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.
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.