Public water system · SD4600193
ActiveLennox
At a glance
Lennox (PWSID SD4600193) is an active community water system in Lincoln County, South Dakota. It reports serving 2,571 people through 1,200 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in March 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,571
Service connections
1,200
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Lennox compare with other water systems in Lincoln County?
By EPA's size categories, Lennox is a small system (501 to 3,300 people). Lincoln County has 9 active public water systems, and Lennox is the 6th-largest of them by population served. Its population served is about 35% below the county average of 3,986 people per system, and accounts for 7.2% of the 35,871 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 Lennox is about 62% 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 Lennox?
EPA lists Lennox 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. 6 of the 9 active systems in Lincoln County (67%) are also owned by a local government.
Does Lennox have drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in March 2020. The violations listed here began between July 1976 and March 2020. By type: 5 monitoring and reporting, 2 contaminant level above the legal limit and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 5 as resolved and 3 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 |
|---|---|---|---|---|
| 2020-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2013-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 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 8 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.
Lennox: frequently asked questions
Who runs Lennox?
Lennox (PWSID SD4600193) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Lennox serve?
Lennox reports serving 2,571 people through 1,200 service connections in Lincoln County, South Dakota.
Where does Lennox 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 Lennox have any drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in March 2020. 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 Lennox'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 8 violations for this system; 2 are health-based, and the most recent began in March 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Lennox's water quality report?
As a community water system, Lennox 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 Lincoln County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Harrisburg | Lincoln | 10,297 | Community | Purchased groundwater |
| Tea | Lincoln | 7,381 | Community | Purchased groundwater |
| Lincoln County Rural Water System | Lincoln + 1 more | 5,965 | Community | Purchased groundwater |
| South Lincoln Rural Water System | Lincoln + 2 more | 5,250 | Community | Groundwater |
| Canton | Lincoln | 3,066 | Community | Groundwater |
| Worthing | Lincoln | 939 | 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, “Lennox, PWSID SD4600193, South Dakota”, https://aquacensus.com/water-systems/south-dakota/lennox-sd4600193 (data as of October 1, 2026).