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Community Water System · PWS SD4602068

South Shore

South Shore, South Dakota 57263 - drinking water served from groundwater sources to 189 people, tracked in EPA SDWIS and UCMR5.

189
People served
117
EPA violations
59
Health-based
Untested
UCMR5 result

The verdict

EPA records 117 drinking-water violations at South Shore, 50% of them health-based - above the South Dakota per-system average.

117
Total EPA violations on record
50%
Health-based (MCL / treatment failure)
189
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: South Shore

South Shore is a local-owned community water system that delivers drinking water to 189 residents in South Shore, South Dakota (Codington County) through 66 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 117 total violations for this system , of which 59 (50%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 49 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 47 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%).

South Shore's 117 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
189
Total Violations
117
Health-Based Violations
59
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
66
County
Codington
School/Daycare
No
MCL Violations
47
Monitoring Violations
49
Treatment Tech Violations
12

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 47 2003
Coliform (TCR) MR 22 2008
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 10 2019
Nitrate MR 4 2013
ETHYLENE DIBROMIDE MR 4 2008
Diquat MR 4 2008
Endothall MR 4 2008
1,2-DIBROMO-3-CHLOROPROPANE MR 4 2008
E. COLI MR 4 2010
Chlorine MR 3 2008
Consumer Confidence Rule Other 2 2001
Groundwater Rule TT 2 2013
Public Notice Other 1 2011

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 Shore.

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 SD4602068 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
2019 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 10 SDWIS / SD4602068 / 0400
2013 Nitrate MR 4 SDWIS / SD4602068 / 1040
2013 Groundwater Rule TT 2 SDWIS / SD4602068 / 0700
2011 Public Notice Other 1 SDWIS / SD4602068 / 7500
2010 E. COLI MR 4 SDWIS / SD4602068 / 3014
2008 Coliform (TCR) MR 22 SDWIS / SD4602068 / 3100
2008 ETHYLENE DIBROMIDE MR 4 SDWIS / SD4602068 / 2946
2008 Diquat MR 4 SDWIS / SD4602068 / 2032
2008 Endothall MR 4 SDWIS / SD4602068 / 2033
2008 1,2-DIBROMO-3-CHLOROPROPANE MR 4 SDWIS / SD4602068 / 2931
2008 Chlorine MR 3 SDWIS / SD4602068 / 0999
2003 Coliform (TCR) MCL 47 SDWIS / SD4602068 / 3100
2001 Consumer Confidence Rule Other 2 SDWIS / SD4602068 / 7000

How South Shore Compares

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

Metric South Shore South Dakota avg Federal benchmark
Total violations 117 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 59 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 189 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 Shore water safe to drink? ▼
South Shore (PWS ID: SD4602068) has 117 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 189 people using Groundwater sources.
How many people does South Shore serve? ▼
South Shore serves 189 people in South Shore, South Dakota. It is a Local-owned system using Groundwater water sources with 66 service connections.
What type of violations does South Shore have? ▼
South Shore has 117 total violations: 59 health-based violations (MCL exceedances or treatment failures), 49 monitoring/reporting violations, and 12 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in South Shore water? ▼
No PFAS testing data is available for South Shore under the EPA's UCMR5 monitoring program.
What water source does South Shore use? ▼
South Shore 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.