Stormwater Pollution Prevention Events
JUNE 2026
*Note: Beginning in July 2026, this stand-alone monthly Stormwater Pollution Prevention Events Bulletin will transition to a combined Topical and Events Bulletin. The new monthly format will focus on educating residents and businesses on various Water Quality Improvement Topics as well as select County-sponsored Stormwater Pollution Prevention Events.
We all play a part in preventing stormwater pollution. Here are some ways to get involved in June and help protect our local waterways! All events are free unless otherwise indicated.
 Ongoing beach and community cleanups help protect the County’s waterways from stormwater pollution and can help preserve water quality for years to come. The County thanks the following beach and community cleanup event partners for their ongoing support in preventing stormwater pollution: I Love A Clean San Diego (ILACSD), Surfrider Foundation San Diego, San Diego Coastkeeper, San Diego River Park Foundation, Think Blue San Diego, Project Clean Water, Tijuana River National Estuarine Research Reserve (TRNERR), San Diego Canyonlands, San Dieguito River Park, Friends of Ruffin Canyon, Agua Hedionda Lagoon Foundation, Friends of Rose Creek, Friends of Famosa Slough, San Diego Bird Alliance, Escondido Creek Conservancy, City of La Mesa, City of Carlsbad, California State Parks Foundation, ASCENDtials, Nature Collective at San Elijo Lagoon, Preserve Calavera, and UC San Diego Natural Reserve System.
June 2
-
8am to 11am – San Diego River Park Foundation River Habitat Restoration. Learn more or sign up.
-
9am to 11:30am and 12pm to 3pm (2 shifts) – Agua Hedionda Lagoon Foundation Algerian Sea Lavender Removal. Learn more or sign up.
June 5
June 6
June 9
-
8am to 11am – San Diego River Park Foundation River Mouth Habitat Restoration. Learn more or sign up.
-
9am to 11:30am and 12pm to 3pm (2 shifts) – Agua Hedionda Lagoon Foundation Algerian Sea Lavender Removal. Learn more or sign up.
June 12
June 13
June 16
-
8am to 11am – San Diego River Park Foundation River Habitat Restoration. Learn more or sign up.
-
9am to 11:30am and 12pm to 3pm (2 shifts) – Agua Hedionda Lagoon Foundation Algerian Sea Lavender Removal. Learn more or sign up.
June 18
June 19
-
9am to 12pm – TRNERR Friday Stewardship Session for Long-term Volunteers. Learn more or sign up.
-
9am to 12pm – San Diego Bird Alliance and Friends of Rose Creek – Habitat Restoration and BioBlitz. Learn more or register.
June 20
June 20
June 21
-
9am to 11am – San Diego River Park Foundation River Mouth Habitat Restoration. Learn more or sign up.
-
12:15pm to 1:30pm and 12:15pm to 2pm (2 shifts) – ASCENDtials Climate Cares Coronado Route 75 Highway Cleanup Event. Learn more here and select ‘check availability’ button to sign up for June event.
June 23
-
8am to 11am – San Diego River Park Foundation River Mouth Habitat Restoration. Learn more or sign up.
-
9am to 11:30am and 12pm to 3pm (2 shifts) – Agua Hedionda Lagoon Foundation Algerian Sea Lavender Removal. Learn more or sign up.
June 26
June 27
-
9am to 11am – ILACSD and City of La Mesa Litter Free La Mesa: La Mesa – University Avenue Cleanup. Learn more or register.
-
9am to 11am – Surfrider Foundation Seaport Village Cleanup. Learn more or register.
-
9am to 11am – San Diego Bird Alliance and UC San Diego Natural Reserve System – Wander the Wetlands Work Party - Kendall-Frost Marsh. Learn more or register.
-
9am to 12pm – Agua Hedionda Lagoon Foundation Trail Cleanup Event – Cove Drive. Learn more or sign up.
June 28
-
12:15pm to 1:30pm – ASCENDtials Climate Cares Highway Cleanup at 5/Mission Bay Beach Club Event. Learn more here and select ‘check availability’ button to sign up for June event.
June 30
Monthly/Ongoing or On Your Own Stormwater Pollution Prevention Events:
-
Tuesdays and Fridays, 8am to 11am – San Diego River Park Foundation River Assessment Field Teams (RAFT). Learn more or sign up.
-
Tuesdays and Fridays, 9am to 12pm – San Dieguito River Park Dust Devils Habitat and Trail Restoration Events – Inland and Coastal Trails. Learn more.
-
Second Fridays, 9am to 10:30am – San Diego River Park Foundation – One-Mile Action Crew (OMAC) Ocean Beach Estuary and Stewardship Ride. Learn more or sign up.
-
Wednesdays and Saturdays, 8am to 11am – San Diego River Park Foundation River Rescue Cleanups. Learn more or sign up.
-
San Diego Surfrider Foundation Ongoing Solo Cleanups. Learn more.
-
Coastkeeper San Diego Six Cleanup Challenge, Flexible Dates/Times. Learn more and see the list of challenge sites.
-
ILACSD Adopt-A-Beach/Adopt-A Canyon Program, Flexible Dates/Flexible Times – Adopt a beach or canyon and lead independent cleanups on your schedule. Learn more and adopt a location.
 University of California Cooperative Extension’s (UCCE) Integrated Pest Management (IPM) Program – The following events will be offered in June.
-
June 3, 3pm to 4pm – Ag Experts Talk Webinar Series – Perennial Weed Management in Vineyards and Orchards – Get an overview of commonly found perennial weeds in orchards and vineyards in the San Joaquin Valley and learn about key management strategies. The presentation will also highlight recent research aimed at improving control of these weeds in permanent crops. Learn more or register.
-
June 18, 12pm to 1pm – Urban & Community Webinar Series – When Composting Goes Rotten – Learn the common mishaps to avoid when composting as well as how to manage pests when they arrive. Learn more or register.
-
UC IPM Video Library – Visit this link for a variety of videos on pest management.
California Native Plant Society (CNPS) – Naturehood Monthly Gardening Webinar: Get Your Native Plants Ready for Summer – June 4, 5:30pm to 6:30pm – Learn techniques that help your plants thrive through heat and dryness. Topics include seasonal pruning, water budgeting, plant-by-plant care tips, and easy design adjustments that increase beauty, resilience, and habitat value all summer long. Learn more or register.
University of California Agriculture and Natural Resources (UCANR) Master Gardeners of San Diego – The following events will be offered in June where you can get science-based answers and practical advice from UCCE certified Master Gardener experts. Topics include garden planning, watering, pest control, and anything garden related.
-
June 10 through July 5, 11am to 5pm – Ask-A-Master Gardener Q&A Sessions at The San Diego County Fair ($$ entry fees vary). Learn more.
-
June 10, 11am to 1pm – Ask-A-Master Gardener Q&A Sessions - San Diego County Operations Center Demonstration Garden. Site location: San Diego County Operations Center, Suite 201, 9335 Hazard Way, San Diego. Learn more.
-
June 10, 3:30pm to 4:30pm – STEAM Kids Garden Talk: Seeds – Site location: Poway Library. Learn more.
San Diego Botanic Garden – The following events will be offered in June.
-
June 10, 6:30pm to 7:30pm – Sips & Science ($$ fees vary) – Learn about the important plant science and conservation work taking place that applies to our everyday lives. Learn more or purchase tickets.
-
June 13, 2pm to 4pm – How to Grow Groceries in Your Garden ($$ fees vary) – Learn how to plan and grow a thriving food garden year-round, even in small spaces. Topics include best practices and climate-smart strategies to maintain healthy soil, manage pests, and maximize small spaces with simple yet innovative methods. Engage in hands-on activities on how to harvest, store, and use “groceries from your garden” creatively in everyday meals. Learn more or register.
-
Monthly SAPLinGS Sessions – Wednesdays, Thursdays, and Fridays, 10am to 12pm – Children are invited to join for Science, Art, and Play in Garden Spaces (SAPLinGS) activities. Topics vary by month and will focus on a different plant or nature-based theme. Science activities engage kids with cool hands-on learning that stimulates curiosity. Art activities focus on projects that spark the imagination. Learn more and view seasonal schedule.
-
Special Activity: Toddler Tales & Tunes in Hamilton Children’s Garden – Fridays – 10:30am to 11am – Join Grandma Kathy as she uses puppets, bells, pompoms, and much more to connect children to plants and nature in the beautiful outdoor setting at the top deck of Hamilton Children’s Garden. Learn more.
The Water Conservation Garden – The following events will be offered in June. Sponsored by Otay and Helix Water Districts, Sweetwater Authority, and the Grossmont-Cuyamaca Community College District.
-
June 12, 9am to 4pm – Free-Day Fridays – Attendees will receive free admission on the second Friday of every month. Activities include mini-tours, arts & crafts, community partner booths, scavenger hunts and prizes, and more. Learn more.
-
June 26, 10am to 11am – Free 2026 County Workshop – Rain Barrels and Beyond: How to Harvest Rainwater for Your Home and Garden – Learn how to collect and reuse rainwater with a simple rain barrel system. Topics will include the basics of setup, maintenance, and best practices for using harvested rainwater in your home and garden. Learn more and register.
-
June 27, 9am to 4pm – Monthly Water District Wave-In Day – On the last Saturday of every month, free admission to the Garden is offered to customers of supporting water districts for a day of learning about sustainable living and water-wise gardening. Enjoy workshops, community partner booths, and water-wise exhibits that help you improve your individual impact on the planet. Learn more or register.
Alta Vista Botanical Garden – Kids in the Garden Classes – June 13, 10am to 12pm – ($5 fee, includes entry to the Garden) – Kids and their families are invited to attend Saturday classes featuring hands-on activities, incredible edibles, conservation lessons, and tours of the gardens. Topics vary by month with the June theme being Veggie Critters. Learn more or pre-register with Farmer Jones at farmerjonesavbg@gmail.com.
Landscape and Water-Savings Webinars – A series of landscape and water-savings webinars will be offered in June hosted by various regional water agencies. Dates and times vary. All events will be virtual and free unless otherwise noted.
The following topics will be hosted or co-hosted by Metropolitan Water District of Southern California (MWD). See calendar and learn more or register.
-
California Friendly & Native Plant Landscape Training – Learn how to design a yard using the four principles of gorgeous and watershed-wise landscaping. Topics include building healthy soil, capturing rainwater, selecting climate-appropriate and native plants, and use of high-efficiency irrigation.
-
Transforming Lawns: A Sustainable Approach – Learn how to transform your yard into a beautiful, sustainable, and water-efficient landscape. Topics include selecting climate-appropriate plant palettes, planning a new landscape that thrives with less water, and exploring sustainable landscape techniques, functions, turf removal options and rebates.
-
Garden Design Seminar – Learn how to identify critical steps for successfully designing a watershed-wise landscape. Topics include creating a successful planting plan, developing a palette of climate-appropriate plants, and sizing and siting the rainwater capture area.
-
Rain to Roots: Water for Your Garden – Learn how to use best management practices for capturing rainwater in the landscape using both passive and active methods. Topics include choosing the right rainwater capture method for your landscape, siting and sizing rain gardens for optimal performance, maintenance tips and troubleshooting common issues, and managing overflow to prevent erosion and flooding.
-
Irrigation & Controller Basics: Smart Watering – Learn how to optimize water use, improve plant health, and reduce runoff by understanding the relationship between soil, water, and system performance. Topics include an overview and basics of irrigation systems, typical irrigation problems and troubleshooting, weather-based controllers, programming essentials, and more.
-
Drip Irrigation: Maintenance & Troubleshooting – Learn how to keep your landscape thriving by making your drip irrigation system more efficient and reliable. Topics include understanding soil moisture balance, identifying key drip system components, reviewing common problems with drip systems and how to avoid them, and developing a successful maintenance routine.
-
SoCal Gas Pro Series – Permeable Everywhere – Slow, Spread, & Sink on Every Landscape (Note: this is a 3-hour webinar) – Learn practical steps to integrating permeability into your landscape. Topics include simple calculations necessary for creating permeability, installing and maintaining permeable hardscapes, steps to improve infiltration rates on every landscape, the difference between active and passive capture, and more. Offered in partnership with The Metropolitan Water District of Southern California. Advanced registration is required. Learn more or register.
The following topics will be hosted by California American Water. See calendar and learn more or register.
-
Eat Your Garden – Learn about how to integrate edibles into your landscaping. Topics include planning for edibles all year round, growing vegetables in planters, and how to successfully irrigate vegetables. Advance registration is required.
-
Weed & Pest Management – Learn how to manage pests organically. Topics include using an integrated pest management (IPM) program, developing strategies to prevent pest problems, and managing weeds and regrowth without chemicals, and non-toxic solutions for pest control.
WaterSmart Residential Landscape and Irrigation Events – The San Diego County Water Authority’s WaterSmart Program is offering past recordings of 3-Hour Landscape Workshops in June. View past workshops.
 I Love a Clean San Diego – The following events will be offered in June.
-
June 4, 1pm to 4pm – City of Encinitas Clothing Swap – Attend for a day of swapping and zero waste! Let’s slow down the consumption of new items and recirculate our clothing back into our local community. Offered in partnership with the City of Encinitas and the Andrews Food Pantry. Learn more.
-
June 4, 6pm to 8pm – EcoKnowledge: Environmental Trivia Night – Test your environmental knowledge on topics such as proper recycling practices, organics recycling, waste sorting, pollution facts, zero waste living dos and don’ts, environmental issues in San Diego, and more. Sponsored by the City of San Diego Environmental Services Department. Site location: Wonderland Ocean Pub, San Diego. Learn more or register.
-
June 8, 5pm to 7pm – Slow Down Swap Party at the Logan Heights Library – Attend this swap event to slow down our consumption and exchange some clothing and accessories. These will help divert fabrics from our local landfills and recirculate them back into the San Diego community. Funded by the City of San Diego Environmental Services Department. Site location: Logan Heights Library, San Diego. Learn more or register.
-
June 17, 6pm to 7:30pm – Unraveling Fast Fashion: Stitching Together a Sustainable Future Workshop – Attend this event to learn how to create a conscious closet and reduce textile waste from local experts in sustainable fashion and textile recycling. Topics include textile recycling and upcycling ideas, low waste laundry habits, secondhand shopping tips, and the environmental impacts of fast fashion. Attendees can participate in various textile upcycling activities such as T-shirt bags, reusable dryer sheets, and natural textile dyeing. Sponsored by the City of San Diego Environmental Services Department. Site location: Dan McKinney YMCA, La Jolla. Learn more or register.
County of San Diego Recycling Events – June 6, 10am to 1pm – Used Oil and Oil Filter Recycling Event – Bring in a used oil filter and receive a new one free! Offered at participating O’Reilly Auto Parts locations. Funded by CalRecycle and offered in partnership with I Love A Clean San Diego and O’Reilly Auto Parts. Learn more and see locations.
Cities of La Mesa and Lemon Grove – Free Household Hazardous Waste Disposal Drive-Through Event – June 6 (by appointment only – 9am to 12:45pm). Residents of the Cities of La Mesa and Lemon Grove can dispose of their household hazardous waste such as batteries, fluorescent bulbs, electronics, paints/solvents, and more. Learn more and schedule an appointment in La Mesa and Lemon Grove.
SD Environmental Services One-Day Collection Event - City of San Diego – June 6, 9am to 1pm – A household hazardous waste (HHW) collection event will be held at Mission Bay South Shores Boat Ramp, San Diego. Learn more.
Zero Waste San Diego Fixit Clinics – Learn how to reduce waste by fixing things instead of throwing items away at the following Fix-It Clinics in May. Bring broken or non-working items for assessment, disassembly, and possible repair. Workspace, specialty tools, and guidance to help you take apart and troubleshoot your item will be provided. Clinics hosted by SD Fixit Clinic with the help of many other zero waste partners.
South Bay Sustainable Communities Network – The following events will be offered in June.
-
June 7, 1pm to 2:30pm – Community Workshops: Worm Compost 101 – Attend this workshop to set up your very own worm bin while learning how to take care of your worms, benefits of having a worm bin, and how to make worm tea. Learn more and sign up.
-
Monthly Compost Pile Turnings – Various days, timeslots, and cities – Attend these monthly turnings of South Bay Sustainable Communities Network soil saver compost bins at select compost hub locations throughout South San Diego County. Compost hubs are also available to community members to drop off food scraps. Scroll to the bottom of home page to check calendar for hub locations and dates.
Solana Center for Environmental Innovation Waste Reduction Events – June 13, 10am to 12pm – Manure Composting for Backyard Farmers’ Workshop – Learn about the importance of composting manure and how it can benefit your garden, our waterways, your budget, and the planet. Topics include how to get started at home and compost manure safely, as well as ways to reduce pests, health hazards, and water contamination. Funded by the County of San Diego. Site location: Valley Center Library. Learn more or register.
 Agua Hedionda Lagoon Foundation – The following events will be offered in June.
-
Grow With Me Young Steward Program – Mondays through Thursdays in June, 10am to 11am ($$ fees vary) – Designed for younger stewards (ages 2-5) and their caregiver, this interactive, hour-long experience blends hands-on learning with opportunities to explore new activities. Together, children will discover what it means to care for and love our planet in fun, meaningful ways. Topics and activities will vary weekly. Learn more or register.
-
Registration Open Now – 2026 Summer Discovery Camps - June through August ($$ fees vary) – Discovery Camps feature hands-on, educational lessons, and activities around a central theme designated for that camp week. All camps take place outdoors in our Nature Nodes, and are filled with nature walks, animal interactions, and crafts. Camp groups are split by age ranges and capped at 12 campers per group with 1 teacher. Camp is for children in kindergarten through 5th grade. Register early as camps fill up quickly. Learn more or register.
Escondido Creek Conservancy Welcome to the Watershed Series! – June 6, 9am to 12pm – Enjoy nature and learn about the work the Conservancy is doing to protect special places throughout the Escondido Creek Watershed. This free monthly activity could include a gentle nature or flower walk, hiking, biking, or nature photography. Learn more or reserve a spot.
Nature Collective at San Elijo Lagoon – The following events will be offered in June.
-
June 6, 10am to 11:30am – Discovery Tour – Get a guided tour of the salt marsh, mudflats, and native plants of the San Elijo Lagoon. Learn more or reserve your spot.
-
June 12, 9am to 10am – Coffee + Connections Open House – Attend this casual meet-and-greet, open-house-style event, where you can connect with key staff, learn about programs and project updates, and meet others who share your passion for protecting nature. Learn more or reserve your spot.
-
June 13, 8:30am to 10:30am – Wildlife Tour – Discover lots of waterfowl playing hide-and-seek with us among the lagoon waters. We may find mushrooms along the way. We will also visit four distinct plant communities at Harbaugh Seaside Trails. Learn more or reserve your spot.
Tijuana River National Estuarine Research Reserve – Junior Rangers Program Ongoing Kids’ Educational Event – Saturdays, 11am to 12pm – Kids ages 8 through 12 are invited to take part in discovering the rich heritage preserved in parks. They will participate in hands-on activities and can earn awards such as pins, certificates, and patches as they progress through the program! Learn more by clicking on the June 6th, 13th, 20th, and 27th dates.
Center for Watershed Protection – 2026 Webcast Series: Webcast 5 – Machine Learning in Watershed Modeling for Stormwater Planning and Flood Forecasting – June 17, 1pm to 2:30pm Eastern Time ($$ fees vary) – This webcast will address how emerging remote sensing technologies and machine learning algorithms can enhance the efficiency of BMP inspection and maintenance. Note the time on the website is posted as Eastern Time. Learn more or register.
San Diego River Park Foundation – The following water quality monitoring events will be offered in June. Help collect data that guides river management and catches potential water quality issues early through monthly water quality sampling.
Batiquitos Lagoon Foundation Docent-Led Lagoon Walks – Summertime in the Wetlands – June 20, 10am to 11:30am – As summer comes on, join for a docent-led nature walk to discover dramatic changes in bird populations in the Wetlands. This is a 90-minute walk appropriate for all ages. Learn more.
Earth Discovery Institute Monarch Butterfly Festival - Crestridge Ecological Reserve – June 20, 10am to 1pm – Attend this family-fun event for a celebration of the monarch butterfly and the native habitat that sustains it. Event includes family-friendly activities, native milkweed and native flowering plants for purchase, a raffle for a chance to win a complete monarch habitat garden, and more. Site location: Crestridge Ecological Reserve, 1181 Horsemill Rd, El Cajon. Learn more.
|
