Rancho Santa Margarita sits east of Mission Viejo, and our 24/7 emergency line at (949) 670-0939 covers it from Lake Forest. We serve ZIP code 92688 with extraction, drying and rebuild.
RSM incorporated on January 1, 2000 as Orange County's 33rd city, and it has about 45,779 residents in 12.9 square miles. Its water story is shaped by canyons, creeks and one water district.
One water district, many canyons
Santa Margarita Water District serves Rancho Santa Margarita and Mission Viejo, plus Coto de Caza, Las Flores, Ladera Ranch, Rancho Mission Viejo and Talega. The district covers about 111 square miles and was formed in 1964.
If a main fails in your street, SMWD is the agency to call, and we handle the damage inside. The district also supplies recycled water, about 3 billion gallons a year, mainly for irrigation.
Flash floods in Trabuco Creek and Tijeras Canyon
The city's draft safety element says flood risk is mainly along Arroyo Trabuco, also called Trabuco Creek, and Tijeras Canyon Creek. Flows are short and high-peak, and dense brush in the channel may raise flood levels.
FEMA 100-year and 500-year zones exist in the city, but the document says no homes or structures are in them because they lie in open space. Dove Canyon is cited as a runoff area, so owners there should keep drains clear.
| Feature | What the city says | Your move |
|---|---|---|
| Arroyo Trabuco (Trabuco Creek) | Main flood risk, flash flooding | Know your lot's runoff path |
| Tijeras Canyon Creek | Flood risk along channel | Keep drains clear |
| FEMA 100 and 500-year zones | In open space, no structures | Still ask about flood coverage |
| Upper Oso and Upper Chiquita reservoirs | Named inundation sources | Know evacuation routes |
When water is spreading in Rancho Santa Margarita
Water is an emergency when it moves, when it contacts power or when it came from outside. Our line is open 24/7, and same-day response is offered when crews are available. Call before you start mopping.
Valve first
Close the main valve, then open a low faucet.
Power next
Cut power to wet areas only if the panel is dry. Otherwise call 911.
Document
Photograph the water and the source before cleanup.
Water in your RSM home?
Call (949) 670-0939. Crews dispatch from Lake Forest.
Services we run most often in Rancho Santa Margarita
Because of creek flash flooding and canyon runoff, flood damage restoration and emergency water removal are the lead services. Rebuild after drying is on our repair page, and mold follows slow leaks. Crews also serve Mission Viejo and Aliso Viejo.
Permits and insurance
The Building and Safety Division is at 22112 El Paseo and its phone is 949-635-1800. Counter hours are Monday to Thursday and Friday morning. Permit rules vary by job, so ask the city building department before demolition.
Homeowners policies generally do not cover flood damage but do cover other kinds of water damage, according to the California Department of Insurance. Keep photos and receipts.
Rancho Santa Margarita water damage questions
Yes. Call (949) 670-0939 any hour. Same-day response is offered when crews are available.
Rancho Santa Margarita has a single ZIP code, 92688, and we serve all of it, including Dove Canyon and Trabuco Highlands.
The city's safety element says flood flows along Trabuco Creek and Tijeras Canyon Creek are short and high-peak. Keep drains and channels clear.
Santa Margarita Water District. We handle the damage inside the home.
No. Trabuco Canyon uses its own postal name and ZIP. Call to confirm service for your address.