Public water system · SD4600092
ActiveClear Lake
At a glance
Clear Lake (PWSID SD4600092) is an active community water system in Deuel County, South Dakota. It reports serving 1,218 people through 610 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,218
Service connections
610
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Clear Lake compare with other water systems in Deuel County?
By EPA's size categories, Clear Lake is a small system (501 to 3,300 people). Deuel County has 2 active public water systems, and Clear Lake is the largest of them by population served. Its population served is about 67% above the county average of 729 people per system, and accounts for 84% of the 1,458 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 Clear Lake 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 Clear Lake?
EPA lists Clear Lake 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. 2 of the 2 active systems in Deuel County (100%) are also owned by a local government.
Does Clear Lake have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2005. The violations listed here began between July 1976 and October 2005. By type: 4 monitoring and reporting. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 2 as resolved and 2 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 |
|---|---|---|---|---|
| 2005-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1998-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
All 4 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.
Clear Lake: frequently asked questions
Who runs Clear Lake?
Clear Lake (PWSID SD4600092) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Clear Lake serve?
Clear Lake reports serving 1,218 people through 610 service connections in Deuel County, South Dakota.
Where does Clear Lake 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 Clear Lake have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2005. 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 Clear Lake'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. EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2005. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Clear Lake's water quality report?
As a community water system, Clear Lake 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 Deuel County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Gary | Deuel | 240 | Community | Purchased groundwater |
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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, “Clear Lake, PWSID SD4600092, South Dakota”, https://aquacensus.com/water-systems/south-dakota/clear-lake-sd4600092 (data as of October 1, 2026).