Public water system · SD4600192
ActiveLemmon
At a glance
Lemmon (PWSID SD4600192) is an active community water system in Perkins County, South Dakota. It reports serving 1,156 people through 700 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in September 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,156
Service connections
700
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Lemmon compare with other water systems in Perkins County?
By EPA's size categories, Lemmon is a small system (501 to 3,300 people). Perkins County has 3 active public water systems, and Lemmon is the largest of them by population served. Its population served is about 79% above the county average of 645 people per system, and accounts for 60% of the 1,936 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 Lemmon 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 surface water means the system buys surface water from another public water system rather than drawing its own. 142 South Dakota systems (20%) list purchased surface water as their primary source.
Who owns and regulates Lemmon?
EPA lists Lemmon 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 3 active systems in Perkins County (67%) are also owned by a local government.
Does Lemmon have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in September 2023. The violations listed here began between January 1999 and September 2023. By type: 9 monitoring and reporting, 1 monitoring, 1 public notice, recordkeeping or other and 1 required treatment not met. The contaminants or rules involved are Revised Total Coliform Rule, Consumer Confidence Rule, Lead and Copper Rule and trans-1,2-Dichloroethylene. EPA lists 12 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2023-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2004-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1999-01-01 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | 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.
Lemmon: frequently asked questions
Who runs Lemmon?
Lemmon (PWSID SD4600192) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Lemmon serve?
Lemmon reports serving 1,156 people through 700 service connections in Perkins County, South Dakota.
Where does Lemmon get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Lemmon have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in September 2023. 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 Lemmon'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, one is health-based, and the most recent began in September 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Lemmon's water quality report?
As a community water system, Lemmon 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 Perkins County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Perkins County Rural Water | Perkins | 470 | Community | Purchased surface water |
| Bison | Perkins | 310 | Community | Purchased surface water |
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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, “Lemmon, PWSID SD4600192, South Dakota”, https://aquacensus.com/water-systems/south-dakota/lemmon-sd4600192 (data as of October 1, 2026).