Asotin County Water Quality
Data and Resources
Additional Info
| Field | Value |
|---|---|
| Source | https://data.wa.gov/resource/ep6p-x4sw |
| Author | Mary Neuman |
| Last Updated | July 22, 2025, 20:06 (UTC) |
| Created | July 22, 2025, 20:06 (UTC) |
| 1. | Definitions of Terms Used: Disinfection Byproducts: Trihalomethanes (TTHMs) form as by-products of the chlorination process that is used to kill or inactivate disease-causing microbes. Haloacetic Acids (HAA) are disinfection by-products monitored to determine compliance with EPA ‘s Disinfection By-products Rule.EPA Allowable Limit orMaximum Contaminant Level (MCL):The highest level of contaminant allowed in drinking water.EPA Ideal Goal orMaximum Contaminant Level Goal (MCLG):The level of contaminant in drinking water below which there is no known or expected health risk.Levels in PUD Water: The highest level of compound detected in the PUD water supply. ND= No detection of substance.Year Tested: Indicates the most recent year that a compound was tested. The state requires certain contaminants to be monitored less than once per year because concentrations do not vary significantly from year to year. Testing occurs between Jan. 1 andDec. 31st.Source of Compound: The common source of the compounds detected.Complies?: A “Yes” indicates that the range detected is within EPA allowable limits. A “No” would require an Action Level (AL), the concentration of a contaminant which, if exceeded, triggers treatment or other requirements a water system must follow. •Parts Per Million/Parts Per Billion (PPM/PPB): These units describe the levels of detected contaminants.•Picocuries per liter (pCi/L):This is a measure of radiation for radionuclide testing. |
| 2. | If you encounter a term that is not defined in the above note, check the attachment and look for it in the specific year where the term was used. |
| Category | Natural Resources & Environment |
| Period of Time | 2003-2020 |
| Posting Frequency | Annually |
| harvest_object_id | 8a881eb6-ffd4-4e7b-bea1-90444a50e8dd |
| harvest_source_id | c4128faf-39ff-4aa3-918e-8a395702cab3 |
| harvest_source_title | washington-state |