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Community Water System · PWS SD4600326

Summit

Summit, South Dakota 57266 - drinking water served from groundwater sources to 288 people, tracked in EPA SDWIS and UCMR5.

288
People served
218
EPA violations
48
Health-based
Untested
UCMR5 result

The verdict

EPA records 218 drinking-water violations at Summit, 22% of them health-based - above the South Dakota per-system average.

218
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
288
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Summit

Summit is a local-owned community water system that delivers drinking water to 288 residents in Summit, South Dakota (Roberts County) through 130 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 218 total violations for this system , of which 48 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 148 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 Coliform (TCR), recorded in 32 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%).

Summit's 218 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
288
Total Violations
218
Health-Based Violations
48
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
130
County
Roberts
School/Daycare
No
MCL Violations
32
Monitoring Violations
148
Treatment Tech Violations
16

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 32 2004
Chlorine MR 20 2014
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 14 2023
Coliform (TCR) MR 11 2014
Lead and Copper Rule MR 6 1996
Total Haloacetic Acids (HAA5) MR 3 2007
TTHM MR 3 2007
E. COLI MR 3 2013
cis-1,2-Dichloroethylene MR 2 2013
Vinyl chloride MR 2 2013
1,1,1-Trichloroethane MR 2 2013
Tetrachloroethylene MR 2 2013
Ethylbenzene MR 2 2013
1,2,4-Trichlorobenzene MR 2 2013
Xylenes, Total MR 2 2013
Carbon tetrachloride MR 2 2013
CHLOROBENZENE MR 2 2013
Styrene MR 2 2013
o-Dichlorobenzene MR 2 2013
1,2-Dichloropropane MR 2 2013
Benzene MR 2 2013
p-Dichlorobenzene MR 2 2013
Toluene MR 2 2013
LASSO MR 2 2018
Heptachlor MR 2 2018
Heptachlor epoxide MR 2 2018
Atrazine MR 2 2018
Total Polychlorinated Biphenyls (PCB) MR 2 2018
Di(2-ethylhexyl) phthalate MR 2 2018
Hexachlorocyclopentadiene MR 2 2018

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 Summit.

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 SD4600326 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 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 14 SDWIS / SD4600326 / 0400
2018 LASSO MR 2 SDWIS / SD4600326 / 2051
2018 Heptachlor MR 2 SDWIS / SD4600326 / 2065
2018 Heptachlor epoxide MR 2 SDWIS / SD4600326 / 2067
2018 Atrazine MR 2 SDWIS / SD4600326 / 2050
2018 Total Polychlorinated Biphenyls (PCB) MR 2 SDWIS / SD4600326 / 2383
2018 Di(2-ethylhexyl) phthalate MR 2 SDWIS / SD4600326 / 2039
2018 Hexachlorocyclopentadiene MR 2 SDWIS / SD4600326 / 2042
2018 Endrin MR 2 SDWIS / SD4600326 / 2005
2018 HEXACHLOROBENZENE MR 2 SDWIS / SD4600326 / 2274
2018 BHC-GAMMA MR 2 SDWIS / SD4600326 / 2010
2018 Chlordane MR 2 SDWIS / SD4600326 / 2959
2018 Toxaphene MR 2 SDWIS / SD4600326 / 2020
2018 Simazine MR 2 SDWIS / SD4600326 / 2037
2018 Dalapon MR 2 SDWIS / SD4600326 / 2031

How Summit Compares

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

Metric Summit South Dakota avg Federal benchmark
Total violations 218 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 48 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 288 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 Summit water safe to drink? ▼
Summit (PWS ID: SD4600326) has 218 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 288 people using Groundwater sources.
How many people does Summit serve? ▼
Summit serves 288 people in Summit, South Dakota. It is a Local-owned system using Groundwater water sources with 130 service connections.
What type of violations does Summit have? ▼
Summit has 218 total violations: 48 health-based violations (MCL exceedances or treatment failures), 148 monitoring/reporting violations, and 16 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Summit water? ▼
No PFAS testing data is available for Summit under the EPA's UCMR5 monitoring program.
What water source does Summit use? ▼
Summit 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.