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San Mateo Countywide Water Pollution Prevention Program
Reducing Pollutants in our Watersheds
Sarah PrattEnvironmental Health
Phone: 650-372-6245Email: [email protected]
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Water Pollution Prevention
San Mateo Countywide Water Pollution Prevention Program (SMCWPPP) is a program that aims to partner with the county's residents and businesses to prevent pollution of our local water bodies; such as creeks, the San Francisco Bay and the Pacific Ocean.
www.flowstobay.org
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We All Live Downstream: Watersheds
• A watershed is the area of land that water flows across on its way to a creek, river, lake, bay, or ocean.
• In urban settings water travels more quickly across pavement than in a natural setting.
• Rain and hosing down carries pollutants into local waterways.
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San Mateo County has 34 Watersheds
Water Drains
•Pacific Ocean
•San Francisco Bay
•Creeks
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Pre-Urban Development: A Healthy Landscape
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Watershed Benefits
• Wildlife habitat
• Parks & Open space
• Natural resources: water
• Nourish forests & plants
• Provide drainage corridors needed to avoid flooding
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The Quality of Our Local Creeks is Linked to Land Cover
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Water Pollution from Streets andParking Lots
• Oil, grease, antifreeze, heavy metals from leaking and deteriorating cars and trucks, and brake pad and tire wear
• Pesticides, herbicides, and fertilizers from our residential and commercial landscapes
• Solvents and household chemicals (e.g., paint thinner, detergents, and paint)
• Animal waste, litter, decomposing vegetation, and sewage from leaks
• Construction debris, such as fresh concrete or mortar
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Gardening for Water Quality
Goals:
• Increase on site infiltration and reduce runoff
• Reduce contaminants in runoff
• Increase the soil’s ability to remove pollutants from runoff
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Use Integrated Pest Management
“…a long-term, preventive approach to managing pests that combines biological, cultural, physical, and/or chemical options. IPM involves a decision-making process based on pest identification and population monitoring, action thresholds, and knowledge of pest biology.”
CALIFORNIA DEPARTMENT OF PESTICIDE REGULATION
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Prevent Pest Problems
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Know & Monitor Beneficials
Check regularly with the University of California www.ipm.ucdavis.edu
Or subscribe to the IPM Practitioner or Common Sense Pest Control from the Bio-Integral Resources Center www.birc.org for up to date information.
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Use Physical, Mechanical, & Biological Controls
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Use Least Toxic Pesticides As Last Resort
www.flowstobay.org/pestcontrol
Pesticides to Avoid• Metaldehyde
• Malathion• Carbaryl
• Pyrethroids (Bifenthrin,
Cypermethrin, Cyfluthrin,
Permethrin)
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“Our Water, Our World” Retail Partnership Program
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Eliminate High Input Decorative Lawn
• Plant groundcovers, shrubs, or trees, instead of turf
• Plant native plant meadows or grassy swales that treat stormwater and resemble native grasslands
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Lawn Uses
• Small area for play• Grows best in sunny
areas with well-drained soil
• Heavy water user• Avoid planting on
slopes• Min 18” buffer
between lawn & sidewalk
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Sheet Mulch to Remove Lawn
See pg 38-39 in Bay Friendly Garden
• Cover with cardboard• On top of cardboard
put 6 inch layer of wood chips
• Let it rest a few months
• Plant!
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Plants to Plant Instead of Lawn
• Manzanita
• Wild lilac
• Red fescue (native bunchgrass)
• Wooly Thyme (drought –tolerant)
• Prairie of red fescue, purple needlegrass, and wild flowers
• Others see pg 56 in Bay Friendly Garden
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Minimize Site Disturbance
• All Soil should have mulch or plant cover
• Retain natural topographic features
• Do not increase steep slopes
• Limit clearing to road, utility building pad, and landscape areas
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Choose and Maintain your Materials & Equipment Carefully
• Choose low emission equipment
• Repair oil leaks and recycle spent oil
• Specify low VOC paints, sealants, solvents, adhesives
• Use sustainably harvested wood
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Keep Soil and Organic Matter Where it Belongs
• Keep plant materials away from storm drains, creek banks, and the shoreline.
Don’t let the stormdrain look like this:
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Minimize Impervious Surfaces
• Watershed quality decreases rapidly when the total impervious area exceeds 10%.
• Yet typical single-family housing projects have 25-50% impervious surfaces.
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Landscaped Areas
By landscaping you are already creating and maintaining areas of pervious surfaces.
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Direct drain spout to landscaped areas
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Green Roofs
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Plant and Protect TreesDesign landscape to
protect 80% of existing, mature, healthy trees
Select trees to:• Microclimate• Soil characteristics• CA Natives or low H2O
Plant• Large stature• Groves & hydrozones
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Manage and Maintain the Irrigation System Carefully
Poor sprinkler design Avoid over-watering
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Design a System to Capture and Treat Water
Catching, slowing and retaining water will promote infiltration and removal of pollutants, as well as minimize stormwater runoff:
• Stormwater curb extension
• Rain garden
• Drain to vegetated swale
• Rain barrel
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Green Streets & Parking Lots
• All resources for capture and treatment of water found in our new Design Guidebook
• Ch 2 Stormwater Facility Strategies
• www.flowstobay.org/greenstreets
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Resources Water Pollution Prevention
www.flowstobay.org IPM Websites: www.ourwaterourworld.org
& www.ipm.ucdavis.edu & www.epa.gov/greenscapes
Ask The Expert Bay-Friendly Gardening guidelines, and UC
Statewide IPM Project books
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www.flowstobay.org/pestcontrol
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www.flowstobay.org/landscape
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Questions??? Homework Assignment: Anything new
you learned from reading Stormwater Brochure or Pollution Prevention Post Newsletter? Any questions after reading?
Sarah [email protected]