Welcome to the Marin Countywide Stormwater Pollution Prevention Program

Marin’s Clean Water Program
Marin’s Clean Water Program

A collaboration of Marin’s 11 cities and towns, and the county protecting water quality

Reducing Priority Pollutants
Reducing Priority Pollutants

Focusing on Marin’s priority pollutants including Sediment, Trash, Pathogens, Pesticides, Mercury, and PCB’s

Providing Resources
Providing Resources

Stormwater resources for businesses, residents, contractors, developers, creek projects and permitting, students and teachers, and more!

Information is Key
Information is Key

We provide interactive trainings for contractors, developers, and county and municipal staff

Visit our Community Corner
Visit our Community Corner

Showcasing our community partnerships, local and countywide projects, and current news and events

MCSTOPPP Countywide Program Logo

MCSTOPPP has been assisting Marin’s 11 cities and towns, and the county since 1993

Report A Discharge
Anonymously report illegal discharges to creeks or storm drains, and illegal dumping

Municipal Staff
Local Stormwater Program resources listed by permit section and requirement

Business Resources

A wide variety of Business Best Management Practices

Construction Projects

Resources and Best Management Practices for Construction

New and Redevelopment

Post Construction Tools, Guidelines, and Requirements

Public Resources

Best Practices on Everything from Boating to Swimming Pools

Creek Restoration and Permitting

Permits, Marin Project Coordination Meetings, and Additional Resources

Eco-friendly Pest Control

Less Toxic Pest Management, Rain Gardens, Native Plants

Students and Teachers

Activities, Projects, Volunteering, Publications, Watershed Maps

Horse Owners and Boarding

Facilities, Land, and Manure Management, Manure Composting