Town Of Moraga

Clean Water Program

The Contra Costa Clean Water Program is dedicated to maintaining a healthy environment in Contra Costa’s beautiful creeks, rivers, the Delta and the Bay.

In 1972, The Federal Water Pollution and Control Act was enacted. In 1987, it was amended and is currently known as the Clean Water Act (CWA). In accordance with CWA amendments, regulations require municipalities to obtain permits which outline programs and activities to control surface stormwater pollution.

To comply with these regulations, Contra Costa County, nineteen of its incorporated cities and the Contra Costa Flood Control & Water Conservation District have joined together to form the Contra Costa Clean Water Program (CCCWP). The CCCWP strives to eliminate stormwater pollution through public education, inspection and enforcement activities and industrial outreach.

For more information regarding the Contra Costa Clean Water Program, including information on stormwater issues, watershed characteristics, and stormwater pollution prevention, please refer to the following links:

• Point of Contact: 
• Stormwater Issues:
• Watershed Characteristics:
• Stormwater Pollution Prevention Alternatives:

• Clean Water Facebook Page:

The Town of Moraga continues its efforts for NPDES compliance with the federally mandated NPDES program. The goal of the National Pollutant Discharge Elimination Program (NPDES) is to reduce the discharge and runoff of non-point source pollutants (NPS) into storm drains which lead to our creeks, reservoirs, and San Francisco Bay.

Highlights of the program include inspection of construction activities for permit compliance, annual cleaning of drainage structures, inspection of all drainage culverts, weekly trash collection, marking of storm drains, and other maintenance to comply with the clean water regulations. 

Stormwater C.3 Guidebook (7th Edition)


What is a storm drain?
Storm Drain

A storm drain is very different from the drains inside a home. Any water that leaves your house through a kitchen or bathroom drain flows to a sewage treatment facility. At a sewage treatment facility, the water undergoes a cleaning process.

Water that flows down a storm drain does not make its way to a water treatment facility. Instead, whatever flows down a storm drain flows directly to a creek, canal, lake, or other body of water.

In Contra Costa County, storm drains flow directly to local creeks, San Francisco Bay, San Leandro Reservoir, and the delta with no treatment. Storm water pollution is a serious problem for wildlife dependent on our waterways and for the people who live near polluted streams or baylands.

In the Town of Moraga it is the RESIDENT'S RESPONSIBILITY to maintain the drainage structures on their private property. These drainage structures usually consist of concrete lined swales that empty into a catch basin that drains to the Town maintained storm drain system at the street.

Periodically, educational flyers are sent to all residents, students, and property owners to better inform them on water conservation and pollution prevention. Please take the time to read these flyers.

Educational Materials
Educational Materials

Feel free to stop by the Public Works office at the 329 Rheem Blvd. for more materials and information. We provide rulers, magnetic clips, flower seed paper for planting, Clean Water Program and ladybug pens, Mr. Funnelhead coloring books, and informational flyers. We also have Municipal Separate Storm Sewer System (MS4) maps available at our office for public review.

For more clean water resources refer to our additional resources section.

What is nonpoint source pollution?

Nonpoint source (NPS) pollution, unlike pollution from industrial and sewage treatment plants, comes from many diffuse sources. NPS pollution is caused by rainfall or snowmelt moving over and through the ground. As the runoff moves, it picks up and carries away natural and human-made pollutants, finally depositing them into creeks, lakes, wetlands, San Francisco Bay, and even our underground sources of drinking water. These pollutants include:

  • Excess fertilizers, herbicides, and insecticides from agricultural lands and residential areas;
  • Oil, grease, and toxic chemicals from motor vehicles and equipment;
  • Sediment from improperly managed construction sites, crop and forest lands, and eroding stream banks;
  • Salt from irrigation practices and acid drainage from abandoned mines;
  • Bacteria and nutrients from livestock, pet wastes, and faulty septic systems;

The following are links to helpful flyers about the most common sources of household runoff pollution:

Washing A Car In Your Driveway
Pet Waste
Leaking Motor Oil On the Street
Fertilizing Your Lawn
Draining Pools and Spas