San Diego Watersheds

Pueblo Watershed

The smallest and the most densely populated of the county’s watersheds, Pueblo covers Lemon Grove, La Mesa, National City, downtown San Diego and Point Loma. We’ve developed approximately 75 percent of the watershed. The existing hard-scape (parking lots, roads, etc.) coupled with the large population means people can generate a lot of urban runoff pollution, […]

Read more...

Tijuana Watershed

About a quarter of this watershed lies within the United States and the remainder lies in Mexico. More than one million people live in this watershed. The main waterway, the Tijuana River, which enters the U.S. at San Ysidro about five miles east of the ocean, suffers from a long list of water quality problems. […]

Read more...

Carlsbad Watershed

One of the broadest watersheds along the San Diego County coastline, the Carlsbad watershed covers south Oceanside to Solana Beach, including Vista, Carlsbad, San Marcos and Encinitas. This watershed encompasses many coastal lagoons and creeks: Loma Alta Creek, Buena Vista Lagoon, Agua Hedionda Lagoon, Batiquitos Lagoon and San Elijo Lagoon/ Escondido Creek. Popular attractions include […]

Read more...

Otay Watershed

This watershed encompasses a lot of unincorporated area as well as portions of the cities of National City, Chula Vista, San Diego, Coronado and Imperial Beach. Two drinking water reservoirs, Upper and Lower Otay Lakes, also provide important habitat and recreational opportunities. The Multiple Species Conservation Plan incorporates 36 square miles of this watershed to […]

Read more...

Sweetwater Watershed

This watershed spans from Cuyamaca Rancho State Park southwest to Chula Vista and includes the Loveland and Sweetwater drinking water reservoirs. Popular attractions include golf courses and three County of San Diego parks: Sweetwater, Steele Canyon and Old Ironside. The watershed’s main waterway, the Sweetwater River empties into San Diego Bay, making this one of […]

Read more...

San Diego Watershed

Almost 500,000 people live in San Diego Watershed, the county’s most populated area. It spans from the Cuyamaca mountains and Julian in the east to Ocean Beach in the west, including Lakeside, Santee, El Cajon, Mission Trails Regional Park and Mission Valley. This watershed encompasses five drinking water reservoirs, including El Capitan, San Vincente and […]

Read more...

Los Peñasquitos Watershed

The Los Peñasquitos Watershed runs from Poway to Torrey Pines State Park and south to Mission Beach (including Clairemont, La Jolla, Carmel Valley, Scripps Ranch and Pacific Beach). Highly urbanized (lots of buildings, roads, and concrete), this watershed and its urban runoff drains to either the Los Peñasquitos Lagoon or to Rose Creek, which flows […]

Read more...

San Dieguito Watershed

Stretching from the Cleveland National Forest and Santa Ysabel in the east to Solana Beach and Del Mar in the west, this watershed exists largely in unincorporated areas of the county. It remains about 50 percent undeveloped (but that may change soon). Communities include Ramona, Fairbanks Ranch, and Rancho Santa Fe. When you play at […]

Read more...

San Luis Rey Watershed

The third largest watershed in the county, San Luis Rey stretches from Warner Springs and Palomar Mountain 55 miles west to Oceanside (just follow Highway 76) and includes Lake Henshaw and lots of agriculture areas near Valley Center. Like Santa Margarita, this watershed narrows as you go west to the coast, following the San Luis […]

Read more...

Santa Margarita Watershed

The way north. This watershed includes some of United States Marine Corps Camp Pendleton and north county unincorporated areas of Fallbrook and Rainbow. The drainage area of this watershed gets sandwiched as you near the coast and follow the Santa Margarita River. It includes the popular Camp Del Mar beach (Del Mar Jetty) located in […]

Read more...