Public water system · SD4602285
ActiveSheridan Lake Highlands, Inc..
At a glance
Sheridan Lake Highlands, Inc.. (PWSID SD4602285) is an active community water system in Pennington County, South Dakota. It reports serving 85 people through 28 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in April 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
85
Service connections
28
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sheridan Lake Highlands, Inc.. compare with other water systems in Pennington County?
By EPA's size categories, Sheridan Lake Highlands, Inc.. is a very small system (500 people or fewer). Pennington County has 150 active public water systems. Its population served is well below the county average of 930 people per system, and accounts for less than 0.1% of the 139,467 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 Sheridan Lake Highlands, Inc.. 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 431 South Dakota systems (62%) list groundwater as their primary source.
Who owns and regulates Sheridan Lake Highlands, Inc..?
EPA lists Sheridan Lake Highlands, Inc.. as privately owned. 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. 134 of the 150 active systems in Pennington County (89%) are also privately owned.
Does Sheridan Lake Highlands, Inc.. have drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in April 2020. The violations listed here began between June 2009 and April 2020. By type: 8 required treatment not met, 3 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Stage 1 Disinfectants and Disinfection Byproducts Rule (4 of them). 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 |
|---|---|---|---|---|
| 2020-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2019-12-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2019-11-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2017-06-28 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2014-10-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2013-05-31 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2012-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2012-06-01 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2010-04-17 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2009-09-02 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2009-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | 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.
Sheridan Lake Highlands, Inc..: frequently asked questions
Who runs Sheridan Lake Highlands, Inc..?
Sheridan Lake Highlands, Inc.. (PWSID SD4602285) is a community water system privately owned. It is regulated by the SD state drinking water program.
How many people does Sheridan Lake Highlands, Inc.. serve?
Sheridan Lake Highlands, Inc.. reports serving 85 people through 28 service connections in Pennington County, South Dakota.
Where does Sheridan Lake Highlands, Inc.. get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Sheridan Lake Highlands, Inc.. have any drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in April 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 Sheridan Lake Highlands, Inc..'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, 9 are health-based, and the most recent began in April 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 Sheridan Lake Highlands, Inc..'s water quality report?
As a community water system, Sheridan Lake Highlands, Inc.. 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 Pennington County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Rapid City | Pennington | 72,009 | Community | Surface water |
| Box Elder | Pennington | 14,000 | Community | Groundwater |
| Rapid Valley Sanitary District | Pennington | 11,408 | Community | Surface water |
| Ellsworth Afb | Pennington | 9,100 | Community | Purchased surface water |
| Nps-Mount Rushmore National Memorial | Pennington | 4,100 | Non-transient non-community | Groundwater |
| Colonial Pine Hills Sanitary Distric | Pennington | 1,200 | Community | 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, “Sheridan Lake Highlands, Inc.., PWSID SD4602285, South Dakota”, https://aquacensus.com/water-systems/south-dakota/sheridan-lake-highlands-inc-sd4602285 (data as of October 1, 2026).