Public water system · SD4600137

Active

Garden City

At a glance

Garden City (PWSID SD4600137) is an active community water system in Clark County, South Dakota. It reports serving 33 people through 43 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in August 2023.

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

Population served

Service connections

Primary source

GWP

Purchased groundwater

System type

CWS

Community water system

System record

PWSIDSD4600137

System typeCommunity water system

Activity statusActive

Population served33

Service connections43

Primary water sourcePurchased groundwater

Owner typeLocal government

Primacy agencySD state drinking water program

City servedGarden City

StateSouth Dakota

ZIP57236

CountyClark County

How does Garden City compare with other water systems in Clark County?

By EPA's size categories, Garden City is a very small system (500 people or fewer). Clark County has 7 active public water systems. Its population served is well below the county average of 582 people per system, and accounts for 0.8% of the 4,073 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 Garden City 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 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 Garden City?

EPA lists Garden City 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. 3 of the 7 active systems in Clark County (43%) are also owned by a local government.

Does Garden City have drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in August 2023. The violations listed here began between January 2019 and August 2023. By type: 7 monitoring and reporting, 3 contaminant level above the legal limit, 1 public notice, recordkeeping or other and 1 monitoring. The contaminant or rule involved most often is Nitrite (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
2023-08-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2023-08-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2020-07-10	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2020-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01	Nitritecode 1041	Yes	Resolved
2019-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitritecode 1041	Yes	Resolved
2019-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitritecode 1041	Yes	Resolved
2019-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2019-01-01	Monitoring and reportingMonitoring, Regular · code 03	Thalliumcode 1085	No	Resolved
2019-01-01	Monitoring and reportingMonitoring, Regular · code 03	Berylliumcode 1075	No	Resolved
2019-01-01	Monitoring and reportingMonitoring, Regular · code 03	Fluoridecode 1025	No	Resolved
2019-01-01	Monitoring and reportingMonitoring, Regular · code 03	Chromiumcode 1020	No	Resolved
2019-01-01	Monitoring and reportingMonitoring, Regular · code 03	Seleniumcode 1045	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.

Garden City: frequently asked questions

Who runs Garden City?

Garden City (PWSID SD4600137) is a community water system owned by a local government. It is regulated by the SD state drinking water program.

How many people does Garden City serve?

Garden City reports serving 33 people through 43 service connections in Clark County, South Dakota.

Where does Garden City 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 Garden City have any drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in August 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 Garden City'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, 3 are health-based, and the most recent began in August 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 Garden City's water quality report?

As a community water system, Garden City 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 Clark County

Water system	County	Population served	Type	Source
Clark Rural Water System	Clark + 3 more	2,325	Community	Groundwater
Clark	Clark	1,148	Community	Purchased groundwater
Willow Lake	Clark	255	Community	Purchased groundwater
Fordham Colony	Clark	142	Community	Groundwater
Collins Colony	Clark	95	Community	Groundwater
Shamrock Colony	Clark	75	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, “Garden City, PWSID SD4600137, South Dakota”, https://aquacensus.com/water-systems/south-dakota/garden-city-sd4600137 (data as of October 1, 2026).