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General Stormwatar Management Mosquito Control BMPa • Ensure Mosquito Control Agencies have access to infrastructure to inspect or make appropriate treatments when necessary. • Manage sprinkler and irrigation systems to minimize runoff entering stormwatar infrastructure. •Avoid intentionally running water into stormwatar systems by not washing sidewalks and driveways, washing cars on streets or driveways, etc. • Inspect facilities weakly during warm weather for the presence of standing water or immature mosquitoes. • Ram ova emergent vegetation and debris from gutters antl channels that accumulate water. • Consider mosquito production during the design, construction, and mainienanee of stormwatar infrastructure. • Design and maintain systems to fully discharge captured water in 96 hours or las9. • Inclutla access for maintenance in system design. • Design systems with permanent water sources such as wetlands, ponds, sumps, and basins to minimize mosquito habitat and plan for routine larval mosquito inspection and control activities with the assistants of a Iecal mosquito control program. Stormwatar Troatmant Ponds •Whenever possible, stock stormwatar ponds and constructed wetlands with mosquito-sating fish available from local mosquito control programs. • Oasign and maf main accessible shorelines to allow for periodic maintenance and/or control of emergent and shoreline vegetation, and routine monitoring and control of mosq uitoas. Emergent plant density should be routinely managed so mosq into predators can move throughout the vegetated areas end ere not excluded from pond edges. •Whenever possible, design and maintain deep zones in excess of four feet(7.2 m)to limit the spread of invasive emergent vegetation such as cattails. The edges below the water surtaca should be as steep as practicable and uniform to discourage dense plant growth that may provide immature mosquitoes with refuge from predators and increased nutrient availability. - Use concrete or liners in shallow areas to discourage plant growth where vegetation is not necessary. •Whenever possible, provide a means for easy dewatering if needed. • Manage the spread and density of floating and submerged vegetation that encourages mosquito production (i.a., water hyacinth, water primrose, parrot's feather, duckweed, and filamentous algal mats). Reference: Bast Management Pracgcaa for Moaqulto Control In Callfomla(July 20'12) Vae[or-Boma Dlaaaea Section California Department of PUOIic Hea1tM1