Public water system · SD4600139
ActiveGary
At a glance
Gary (PWSID SD4600139) is an active community water system in Deuel County, South Dakota. It reports serving 240 people through 150 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in February 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
240
Service connections
150
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Gary compare with other water systems in Deuel County?
By EPA's size categories, Gary is a very small system (500 people or fewer). Deuel County has 2 active public water systems, and Gary is the 2nd-largest of them by population served. Its population served is well below the county average of 729 people per system, and accounts for 16% 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 Gary 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 Gary?
EPA lists Gary 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 Gary have drinking water violations?
EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in February 2024. The violations listed here began between July 1976 and February 2024. By type: 2 required treatment not met, 2 public notice, recordkeeping or other and 2 monitoring and reporting. The contaminant or rule involved most often is Stage 1 Disinfectants and Disinfection Byproducts Rule (2 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2024-02-28 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2010-02-01 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2003-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | 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 6 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.
Gary: frequently asked questions
Who runs Gary?
Gary (PWSID SD4600139) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Gary serve?
Gary reports serving 240 people through 150 service connections in Deuel County, South Dakota.
Where does Gary 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 Gary have any drinking water violations?
EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in February 2024. 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 Gary'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 6 violations for this system; 2 are health-based, and the most recent began in February 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Gary's water quality report?
As a community water system, Gary 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 |
|---|---|---|---|---|
| Clear Lake | Deuel | 1,218 | Community | Purchased groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Gary, PWSID SD4600139, South Dakota”, https://aquacensus.com/water-systems/south-dakota/gary-sd4600139 (data as of October 1, 2026).