Public Water Partners

Prosser, WA · Benton County

PROSSER CITY OF Water System

Consumer Confidence Report status

PROSSER CITY OF 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 PROSSER CITY OF.

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 Washington’s official records. Always confirm current status with Washington before making decisions based on this information.

System facts

System ID (PWSID)
WA5369750
System type
Community Water System
Population served
12,070
Service connections
2,889
Ownership
local government
Water source
groundwater (wells)

PROSSER CITY OF is one of 111 community water systems in Washington in the 10,001 to 100,000 people size category, serving 12,070 people from groundwater.

As of August 1, 2026, its federal record holds 8 entries between 1979 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.

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 Total Coliform Rules, inorganic chemicals, and the Radionuclides and Revised Rad Rule.

Violation history

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    July 1, 2008 – September 30, 2008

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    October 1, 2004 – December 31, 2004

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    October 1, 1996 – October 31, 1996

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    October 19, 1994 – November 18, 1994

    Archived

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    January 1, 1994 – January 31, 1994

    Archived

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    September 1, 1992 – September 30, 1992

    Archived

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    October 1, 1979 – October 31, 1979

    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 PROSSER CITY OF required to publish a Consumer Confidence Report?

Yes. PROSSER CITY OF 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 PROSSER CITY OF’s next Consumer Confidence Report due?

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

Does PROSSER CITY OF have any open drinking water violations on record?

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

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

PROSSER CITY OF

Phone not on record

Prosser, WA 99350