Public water system · SD4600948

Active

Pine Grove

At a glance

Pine Grove (PWSID SD4600948) is an active community water system in Pennington County, South Dakota. It reports serving 425 people through 150 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, 4 are health-based, and the most recent began in September 2013.

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

Population served

425

Service connections

150

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDSD4600948

System typeCommunity water system

Activity statusActive

Population served425

Service connections150

Primary water sourceGroundwater

Owner typePrivate

Primacy agencySD state drinking water program

City servedRapid City

StateSouth Dakota

ZIP57702

CountyPennington County

How does Pine Grove compare with other water systems in Pennington County?

By EPA's size categories, Pine Grove is a very small system (500 people or fewer). Pennington County has 150 active public water systems. Its population served is about half of the county average of 930 people per system, and accounts for 0.3% 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 Pine Grove 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 Pine Grove?

EPA lists Pine Grove 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 Pine Grove have drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in September 2013. The violations listed here began between August 1990 and September 2013. By type: 8 monitoring and reporting and 4 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 11 as resolved and 1 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
2013-09-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1998-09-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1996-06-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1996-06-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1996-01-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1993-07-01	Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25	Total coliform bacteria (TCR)code 3100	No	Archived
1990-08-30	Monitoring and reportingMonitoring, Regular · code 03	Chromiumcode 1020	No	Resolved
1990-08-30	Monitoring and reportingMonitoring, Regular · code 03	Fluoridecode 1025	No	Resolved
1990-08-30	Monitoring and reportingMonitoring, Regular · code 03	Seleniumcode 1045	No	Resolved
1990-08-30	Monitoring and reportingMonitoring, Regular · code 03	Mercurycode 1035	No	Resolved
1990-08-30	Monitoring and reportingMonitoring, Regular · code 03	Cadmiumcode 1015	No	Resolved
1990-08-30	Monitoring and reportingMonitoring, Regular · code 03	Bariumcode 1010	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.

Pine Grove: frequently asked questions

Who runs Pine Grove?

Pine Grove (PWSID SD4600948) is a community water system privately owned. It is regulated by the SD state drinking water program.

How many people does Pine Grove serve?

Pine Grove reports serving 425 people through 150 service connections in Pennington County, South Dakota.

Where does Pine Grove 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 Pine Grove have any drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in September 2013. 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 Pine Grove'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, 4 are health-based, and the most recent began in September 2013. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.

Where can I find Pine Grove's water quality report?

As a community water system, Pine Grove 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, “Pine Grove, PWSID SD4600948, South Dakota”, https://aquacensus.com/water-systems/south-dakota/pine-grove-sd4600948 (data as of October 1, 2026).