Public water system · SD4600428

Active

Prairie Acres South

At a glance

Prairie Acres South (PWSID SD4600428) is an active community water system in Pennington County, South Dakota. It reports serving 170 people through 68 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, 5 are health-based, and the most recent began in October 2019.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

170

Service connections

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDSD4600428

System typeCommunity water system

Activity statusActive

Population served170

Service connections68

Primary water sourceGroundwater

Owner typePrivate

Primacy agencySD state drinking water program

City servedRapid City

StateSouth Dakota

ZIP57709

CountyPennington County

How does Prairie Acres South compare with other water systems in Pennington County?

By EPA's size categories, Prairie Acres South 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 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 Prairie Acres South 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 Prairie Acres South?

EPA lists Prairie Acres South 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 Prairie Acres South have drinking water violations?

Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2019. The violations listed here began between January 2000 and October 2019. By type: 4 required treatment not met, 4 monitoring and reporting, 3 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Chlorine (3 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
2019-10-08	Required treatment not metFailure To Address Deficiency · code 45	Groundwater Rulecode 0700	Yes	Resolved
2016-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2015-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2015-02-01	Required treatment not metTreatment Technique No Certif. Operator · code 12	Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400	Yes	Resolved
2011-03-08	Required treatment not metTreatment Technique No Certif. Operator · code 12	Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400	Yes	Resolved
2009-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2009-01-01	Required treatment not metTreatment Technique No Certif. Operator · code 12	Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400	Yes	Resolved
2008-11-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2002-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2001-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2000-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2000-01-01	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.

Prairie Acres South: frequently asked questions

Who runs Prairie Acres South?

Prairie Acres South (PWSID SD4600428) is a community water system privately owned. It is regulated by the SD state drinking water program.

How many people does Prairie Acres South serve?

Prairie Acres South reports serving 170 people through 68 service connections in Pennington County, South Dakota.

Where does Prairie Acres South 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 Prairie Acres South have any drinking water violations?

Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2019. 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 Prairie Acres South'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, 5 are health-based, and the most recent began in October 2019. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.

Where can I find Prairie Acres South's water quality report?

As a community water system, Prairie Acres South 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, “Prairie Acres South, PWSID SD4600428, South Dakota”, https://aquacensus.com/water-systems/south-dakota/prairie-acres-south-sd4600428 (data as of October 1, 2026).