Water System

The City of Pullman obtains its groundwater supply from the Pullman-Moscow Groundwater Basin. The Basin also serves the City of Moscow, Washington State University, the University of Idaho, Palouse and other rural residents in Whitman and Latah Counties. The water supply for the basin is withdrawn from several different geologic formations within the Columbia River Basalt group, the most productive of which is the Grande Ronde Basalt. When the first wells were drilled in the late 1800s, the aquifers were artesian, rising to as much as 25 feet above the ground surface. Today, however, groundwater levels are declining, causing the basin to become the subject of numerous published studies, beginning in 1897 and continuing to the present. The City has implemented many water conservation measures over the years in an effort to reduce its impact on the aquifer.

Water Quality

The City of Pullman's Consumer Confidence Report (CCR) is published annually and provides information about regulated compounds that have been detected in our drinking water, and additional information about drinking water sources, protection, treatment, testing, and compliance. The CCR provides information about regulated compounds, plus information about compounds that were not detected, and compounds that are not regulated or that relate to the aesthetics of the drinking water.

The compounds listed in the CCR are divided into one of three groups:

  • Primary Standards, which relate to public health. The public is notified if any of these levels are exceeded.
  • Secondary Standards, which relate to aesthetic qualities such as taste, odor, and appearance.
  • Unregulated compounds, which are monitored in the interest of our customers, or to assist regulators in developing future regulations.
The CCR report is published annually based on information collected during the previous calendar year. View the annual reports below.

Consumer Confidence Water Reports:
2022 2021 2020 2019
2018 2017 2016 2015

Water Discoloration

Water Utility Fee Schedule
Doc app

Document Center

The Document Center provides easy access to public documents. Click on one of the categories below to see related documents or use the search function.

Categories always sorted by seq (sub-categories sorted within each category)
Documents sorted by SEQ in Ascending Order within category

Consurmer Confidence Water Report8 documents

  • 2022
    document seq 0.00
  • 2021
    document seq 0.00
  • 2020
    document seq 0.00
  • 2019
    document seq 0.00
  • 2018
    document seq 0.00
  • 2017
    document seq 0.00
  • 2016
    document seq 0.00
  • 2015
    document seq 0.00
Ada Icon