Water Use Rules in Thurston County, WA (2026)
1 rule for unincorporated Thurston County, Washington.
Verified from official government sources
Note: These county rules apply to unincorporated areas of Thurston County. If you live within an incorporated city, that city's own rules apply: see the city list below.
Recycled Water Rules
Thurston County allows irrigation with Class A reclaimed water at agronomic rates across all critical aquifer recharge areas under TCC 24.10.190, but infiltrating reclaimed water above agronomic rates is not yet regulated and remains pending further study.
Thurston County Reclaimed Water Irrigation Rule
Some RestrictionsThurston County Code § 24.10.190
A. Irrigation with Class A reclaimed water at agronomic rates is permitted in all CARAs, subject to TCC 24.10.030. B. Infiltration of reclaimed water (application to the land's surface above agronomic rates) Critical area regulations will be proposed when more information is available to Thurston County from the Regional Groundwater Recharge Scientific Study, and using other studies and informa...
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