Water Use Rules in Marin County, CA (2026)
2 rules for unincorporated Marin County, California.
Verified from official government sources
Recycled Water Rules
Marin County Code of Ordinances § 23.18.073(D) lets property owners irrigate with recycled water, but any holding pond built for it may not discharge except during a twenty-five-year, twenty-four-hour storm event, and any release must be reported to the Regional Water Board and the county within twenty-four hours.
Marin County Recycled-Water Holding Pond Rule
Some RestrictionsMarin County Code of Ordinances § 23.18.073(D)
In all urbanized areas, property owners shall control irrigation systems to prevent excessive irrigation runoff by implementing the following BMPs: ...D.Where recycled water is used for irrigation, design and manage holding ponds such that no discharge occurs unless it is the result of the twenty-five-year-twenty-four-hour storm event. Any releases from holding ponds must be reported to the reg...
Leak Reporting Duty
Marin County Code of Ordinances § 23.18.073 requires every property owner in an urbanized unincorporated area to detect and repair leaks in an irrigation system within seventy-two hours of discovering them, as one of the mandatory best management practices for controlling irrigation runoff into county storm drains.
72-Hour Irrigation Leak Repair Duty
Some RestrictionsMarin County Code of Ordinances § 23.18.073(A)
In all urbanized areas, property owners shall control irrigation systems to prevent excessive irrigation runoff by implementing the following BMPs: A.Detect and repair leaks from the irrigation system within seventy-two hours of discovering the leak; ...
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