Public Water Partners

ONIDA, SD · Sully County

ONIDA Water System

Consumer Confidence Report status

ONIDA must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for ONIDA.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)
SD4600233
System type
Community Water System
Population served
658
Service connections
410
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

ONIDA is one of 124 community water systems in South Dakota in the 501 to 3,300 people size category, serving 658 people from surface water.

As of August 1, 2026, its federal record holds 8 entries between 1976 and 2003, all of which EPA lists as closed. Nothing has been added since 2003.

Of the 8, 6 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Radionuclides and Revised Rad Rule, the Total Coliform Rules, and the Consumer Confidence Rule.

Violation history

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    July 1, 2003 – July 31, 2003

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2000 – July 26, 2000

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 1999 – September 28, 2001

    Resolved

  • Monitoring, Regular

    —

    Combined Radium (-226 and -228)

    July 1, 1996 – September 30, 1996

    Resolved

  • Monitoring, Regular

    —

    Combined Radium (-226 and -228)

    April 1, 1996 – June 30, 1996

    Resolved

  • Maximum Contaminant Level Violation, Average

    Health-based

    Fluoride

    April 9, 1980 – April 8, 1983

    Archived

  • 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

Common questions

Is ONIDA required to publish a Consumer Confidence Report?

Yes. ONIDA is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is ONIDA’s next Consumer Confidence Report due?

ONIDA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does ONIDA have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for ONIDA.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

ONIDA

6052582231

ONIDA, SD 57564