CA AB1093

Requires the State Water Resources Control Board to establish financial capability assessment guidelines for municipal separate storm sewer system permittees by July 1, 2020, ensuring adequacy and consistency when considering costs to local jurisdictions.

Directs the state board and regional boards to continue using available regulatory tools and approaches to foster collaboration with permittees in implementing permit requirements while accounting for implementation costs.

Guidelines must document sources used to estimate local costs and overall stormwater management costs, considering EPA policies on financial capability assessment and affordability criteria for water systems.

Aims to help local governments lacking dedicated revenue sources for stormwater comply with federal Clean Water Act requirements while providing alternative compliance pathways and achievable schedules for disadvantaged communities.