Public water system · SD4600088
ActiveChester Sanitary District
At a glance
Chester Sanitary District (PWSID SD4600088) is an active community water system in Lake County, South Dakota. It reports serving 363 people through 141 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2003.
This page covers its drinking water system only; sewer and wastewater service are not part of EPA's drinking water records.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
363
Service connections
141
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Chester Sanitary District compare with other water systems in Lake County?
By EPA's size categories, Chester Sanitary District is a very small system (500 people or fewer). Lake County has 5 active public water systems, and Chester Sanitary District is the 3rd-largest of them by population served. Its population served is well below the county average of 1,956 people per system, and accounts for 3.7% of the 9,782 people reported by systems filed under the county. Across South Dakota, the 699 active systems average 1,387 people each. Nationally, the average active community water system reports serving 6,703 people, so Chester Sanitary District is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. South Dakota has 510 active community water systems, 73% of the state's 699 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 100 South Dakota systems (14%) list purchased groundwater as their primary source.
Who owns and regulates Chester Sanitary District?
EPA lists Chester Sanitary District as owned by a local government. The SD state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 4 of the 5 active systems in Lake County (80%) are also owned by a local government.
Does Chester Sanitary District have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2003. The violations listed here began between January 1993 and July 2003. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 11 as resolved and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2003-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1995-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1995-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1994-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1994-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4,5-TP (Silvex)code 2110 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dinosebcode 2041 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylene dibromide (EDB)code 2946 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dibromo-3-chloropropane (DBCP)code 2931 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) adipatecode 2035 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4-Dcode 2105 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Chester Sanitary District: frequently asked questions
Who runs Chester Sanitary District?
Chester Sanitary District (PWSID SD4600088) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Chester Sanitary District serve?
Chester Sanitary District reports serving 363 people through 141 service connections in Lake County, South Dakota.
Where does Chester Sanitary District get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Chester Sanitary District have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2003. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Chester Sanitary District's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2003. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Chester Sanitary District's water quality report?
As a community water system, Chester Sanitary District must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Lake County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Madison | Lake | 6,191 | Community | Groundwater |
| Kingbrook Iii Rural Water System | Lake | 2,888 | Community | Groundwater |
| Wentworth | Lake | 181 | Community | Purchased groundwater |
| Ramona | Lake | 159 | Community | Purchased groundwater |
Related pages
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Chester Sanitary District, PWSID SD4600088, South Dakota”, https://aquacensus.com/water-systems/south-dakota/chester-sanitary-district-sd4600088 (data as of October 1, 2026).