Drinking Water Compliance OS

MCCOOK LAKE, SD · Union County

NORTH SIOUX CITY - MCCOOK LAKE SYSTE Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of April 1, 2000. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in Union County, SD.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace South Dakota’s official records. Always confirm current status with South Dakota before making decisions based on this information.

System facts

System ID (PWSID)
SD4600177
System type
Community Water System
Population served
1,300
Service connections
372
Ownership
privately owned
Water source
groundwater (wells)

Violation history

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 1999 – April 1, 2000

    Resolved

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    July 1, 1976 – June 30, 1980

    Archived

  • Monitoring, Regular

    —

    Combined Radium (-226 and -228)

    July 1, 1976 – June 30, 1980

    Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

No enforcement actions on record for this system.

Last known contact on file (system is inactive)

Not on record

605-232-4550

MCCOOK LAKE, SD 570491845