Background
The Marin Municipal Water District adopted a rate ordinance in May 2023 establishing new water service rates through June 2027. The District followed Proposition 218’s procedural requirements: it conducted a cost-of-service analysis, mailed notice to property owners, held public workshops and a hearing, and counted written protests (receiving 599—far below the roughly 28,000 needed for a majority protest). The ordinance took effect 30 days later.
The following month, the District filed a “validation action” under Code of Civil Procedure sections 860–870—an accelerated in rem procedure that lets public agencies quickly confirm the legality of their rates. The trial court ordered notice by publication in the Marin Independent Journal for three consecutive weeks. No one filed an opposing pleading by the deadline, so the court entered a default judgment validating the rates.
Meanwhile, ratepayer Tove Hiller filed a class-action complaint and mandamus petition in September 2023 alleging the rates violated Proposition 218’s requirement that water charges reflect the proportional cost of service. She did not serve the District until November—well after the validation judgment was already final. The District demurred, and the trial court sustained the demurrer without leave to amend.
The Court’s Holding
The First District Court of Appeal affirmed. The court held that Government Code section 53759—enacted in 2022 to require all challenges to water or sewer rate ordinances to proceed under the validation statutes within 120 days—barred Hiller’s claims. Because the District had already filed its own validation action and obtained a final default judgment, Hiller’s only options were to have filed a “reverse validation” action before the District filed, or to have appeared in the District’s validation proceeding. She did neither.
The court rejected Hiller’s argument that the validation statutes cannot override the constitutional protections of Proposition 218. The validation framework does not alter Proposition 218’s substantive requirements—it simply provides the procedure for enforcing them. The court also rejected Hiller’s textual argument that section 53759 applies only to “actions” and not to mandamus “proceedings,” finding that the statute’s language, companion statutes (sections 53759.1 and 53759.2), and legislative history all confirm the Legislature intended to channel every legal challenge to water rates—regardless of form—through the validation process.
Finally, the court found no due process violation in the District’s failure to personally notify Hiller of its validation action, even though the District knew she had filed government claims. The published notice complied with the validation statutes, and a “diligent plaintiff,” particularly one with counsel, should have been aware of the 120-day window.
Key Takeaways
- Under Government Code section 53759, any challenge to a water or sewer rate ordinance—whether styled as a complaint, mandamus petition, or other proceeding—must be brought within 120 days under the validation statutes.
- Once a water district files a validation action and obtains a final judgment, ratepayers who failed to participate are barred from later attacking the rates, including on constitutional grounds under Proposition 218.
- Section 53759 and its companion statutes (sections 53759.1 and 53759.2) reflect a clear legislative intent to create a single, streamlined procedure for all water rate challenges—no alternative litigation paths are available.
- Notice by publication in a general-circulation newspaper, as provided by the validation statutes, satisfies due process even for ratepayers who previously filed government claims or are represented by counsel.
- Practitioners representing ratepayers must calendar the 120-day limitation period from the effective date of any water or sewer rate ordinance—missing it forfeits the right to challenge the rates entirely.
Why It Matters
This is the first published decision squarely addressing how Government Code section 53759—California’s 2022 statute mandating validation-style litigation for water rate challenges—interacts with Proposition 218’s constitutional protections. The court’s holding makes clear that the 120-day clock runs from adoption, not from billing, and that no form of lawsuit can sidestep it.
For California water districts, the decision provides powerful reassurance: a proactive validation action, followed by proper publication, can insulate rate increases from later attack. For ratepayers and their attorneys, it is a stark warning. Missing the 120-day window—or ignoring a district’s published validation summons—means losing the ability to challenge rates in court, even on Proposition 218 grounds. Given that the court also rejected the argument that mandamus petitions fall outside section 53759, there is truly no backdoor remaining.