State Hub
South Dakota Water Quality
152
Utilities in database
0.8M
Residents served
0
With open violations
46
PFAS monitored
Quick Answer
South Dakota public drinking water is served by 152 EPA-tracked water systems, providing service to approximately 0.8 million residents through public utilities. No open health-based violations are currently recorded across tracked systems in the EPA federal database. 46 systems have official PFAS monitoring records from the EPA UCMR 5 program (2023–2025). About 45% of SD residents use private wells, which fall outside federal utility compliance monitoring.
No open health-based violations are currently recorded in the EPA SDWIS database for South Dakota's tracked water systems. Always verify with your utility's Consumer Confidence Report for annual test results.
Drinking Water in South Dakota
South Dakota has 152 community water systems serving approximately 0.8 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, arsenic. 45% of South Dakota residents rely on private wells. DENR holds primary enforcement authority under the Safe Drinking Water Act.
Safest Large Utilities
South Dakota systems with no open health violations serving 10,000+ residents.
Utilities in South Dakota
76–100 of 152Crooks
SD4600391 · 1,362 served
Miller
SD4600211 · 1,349 served
Freeman
SD4600134 · 1,329 served
Salem
SD4600288 · 1,325 served
Baltic
SD4600034 · 1,271 served
Platte
SD4600246 · 1,256 served
Lakota Tech High School
SD4600332 · 1,250 served
Garretson
SD4600138 · 1,228 served
Gregory
SD4600145 · 1,221 served
Clear Lake
SD4600092 · 1,218 served
Britton
SD4600388 · 1,215 served
Colonial Pine Hills Sanitary Distric
SD4600263 · 1,200 served
Aurora
SD4600058 · 1,200 served
Chapel Lane Water Company
SD4600264 · 1,200 served
Wr/lj - Creighton Project
SD4602156 · 1,170 served
Gettysburg
SD4600142 · 1,162 served
Deadwood
SD4600104 · 1,156 served
Lemmon
SD4600192 · 1,156 served
Clark
SD4600091 · 1,148 served
Northdale Sanitary District
SD4600514 · 1,075 served
Fall River Wud
SD4602201 · 1,057 served
De Smet
SD4600059 · 1,056 served
Parker
SD4600235 · 1,025 served
Tyndall
SD4600337 · 1,012 served
Piedmont
SD4602303 · 971 served
Key Contaminant Concerns in South Dakota
These contaminants appear most frequently in South Dakota utility records or pose elevated risk in this region based on EPA data.
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
EPA limit: 80 µg/L (TTHMs) / 60 µg/L (HAA5)
Arsenic
Arsenic (As) occurs naturally in rock and soil, dissolving into groundwater through natural weathering processes. Inorganic arsenic — the form found in drinking water — is a known human carcinogen. The western United States has particularly arsenic-rich geological formations, but elevated levels have been found in 48 states. Arsenic is tasteless and odorless.
EPA limit: 10 ppb
City Water Reports in South Dakota
Tap water quality pages for South Dakota cities — violations, PFAS records, utility profiles, and official source links.
Independent Water Testing
Find a certified lab in South Dakota
Utility compliance records show what water systems report to the EPA. An independent test from a certified laboratory confirms what's actually in your tap water. South Dakota labs can test for PFAS, lead, nitrates, bacteria, and dozens of other contaminants.
Explore Water Quality in South Dakota
Crooks
Violation history, PFAS records, and official source links
Miller
Violation history, PFAS records, and official source links
Freeman
Violation history, PFAS records, and official source links
PFAS monitoring records — South Dakota
46 water systems in South Dakota with EPA UCMR 5 records
Lead in South Dakota drinking water
State-specific lead data, violation utilities, and testing guidance
PFAS in South Dakota drinking water
State-specific PFAS data, MCL context, and treatment options
Certified water testing labs in South Dakota
Labs certified for PFAS (EPA 533/537.1), lead, and bacteria testing
Water treatment options
Reverse osmosis, activated carbon, and filtration guides with cost ranges
Data sources and methodology
How WaterUtilityReport.com sources and validates official EPA data
Common Questions About South Dakota Drinking Water
Does South Dakota drinking water have PFAS?
46 South Dakota water systems have EPA UCMR 5 PFAS monitoring records (2023–2025)
Which South Dakota water utilities have open violations?
Browse South Dakota utility compliance records and violation history
How do I test my water in South Dakota?
State-certified labs for PFAS (EPA 533/537.1), lead, nitrate, and bacteria testing
What treatment removes PFAS from SD tap water?
Reverse osmosis removes PFAS, lead, arsenic, and nitrates — cost, maintenance, and NSF certification explained
What do South Dakota PFAS records tell me about my water?
EPA limits, health context, and what UCMR 5 detection above MRL means for your water
How is South Dakota water quality data sourced here?
EPA SDWIS violations, UCMR 5 PFAS records, and CCR data — sources, accuracy notes, and limitations
South Dakota Water FAQs
Data sources: Utility compliance and violation data from EPA SDWIS (Safe Drinking Water Information System). PFAS monitoring records from EPA UCMR 5 (Unregulated Contaminant Monitoring Rule 5, 2023–2025). Contaminant data from EPA and ATSDR public references. This page summarizes public records — it is not a compliance determination. Methodology →
Last updated: 2026-04-24