Public water system · SD4600246

Active

Platte

At a glance

Platte (PWSID SD4600246) is an active community water system in Charles Mix County, South Dakota. It reports serving 1,256 people through 692 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in August 2023.

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

Population served

1,256

Service connections

692

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDSD4600246

System typeCommunity water system

Activity statusActive

Population served1,256

Service connections692

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencySD state drinking water program

City servedPlatte

StateSouth Dakota

ZIP57369

CountyCharles Mix County

How does Platte compare with other water systems in Charles Mix County?

By EPA's size categories, Platte is a small system (501 to 3,300 people). Charles Mix County has 6 active public water systems, and Platte is the 3rd-largest of them by population served. Its population served is about 25% below the county average of 1,675 people per system, and accounts for 12% of the 10,052 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 Platte 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 surface water means the system buys surface water from another public water system rather than drawing its own. 142 South Dakota systems (20%) list purchased surface water as their primary source.

Who owns and regulates Platte?

EPA lists Platte 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. 5 of the 6 active systems in Charles Mix County (83%) are also owned by a local government.

Does Platte have drinking water violations?

EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in August 2023. The violations listed here began between August 1991 and August 2023. By type: 6 monitoring and reporting and 5 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (5 of them). EPA lists 9 as resolved and 2 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
2023-08-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2023-08-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2017-02-01	Required treatment not metTreatment Technique No Certif. Operator · code 12	Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400	Yes	Resolved
2010-10-17	Required treatment not metPublic Education · code 65	Lead and Copper Rulecode 5000	Yes	Resolved
2010-04-10	Required treatment not metPublic Education · code 65	Lead and Copper Rulecode 5000	Yes	Resolved
2009-10-22	Required treatment not metPublic Education · code 65	Lead and Copper Rulecode 5000	Yes	Resolved
2009-04-25	Required treatment not metPublic Education · code 65	Lead and Copper Rulecode 5000	Yes	Resolved
1998-05-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Archived
1996-01-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1993-01-01	Monitoring and reportingMonitoring, Regular · code 03	Asbestoscode 1094	No	Resolved
1991-08-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Archived

All 11 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.

Platte: frequently asked questions

Who runs Platte?

Platte (PWSID SD4600246) is a community water system owned by a local government. It is regulated by the SD state drinking water program.

How many people does Platte serve?

Platte reports serving 1,256 people through 692 service connections in Charles Mix County, South Dakota.

Where does Platte get its water?

EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.

Does Platte have any drinking water violations?

EPA's records list 11 violations for this system; 5 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 Platte'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 11 violations for this system; 5 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 Platte's water quality report?

As a community water system, Platte 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 Charles Mix County

Water system	County	Population served	Type	Source
Randall Community Water District	Charles Mix	6,248	Community	Surface water
Wagner	Charles Mix	1,490	Community	Purchased surface water
Lake Andes	Charles Mix	710	Community	Purchased surface water
Pickstown	Charles Mix	230	Community	Purchased surface water
Lakeview Colony	Charles Mix	118	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, “Platte, PWSID SD4600246, South Dakota”, https://aquacensus.com/water-systems/south-dakota/platte-sd4600246 (data as of October 1, 2026).