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As Rain Quiets Activity on the Mosquito Fire, Water Managers in Placer County Prepare for Years of Water Quality Challenges

This week’s rain has been a welcome sight for those dealing with the impacts of the Mosquito Fire. The early season moisture has helped to significantly dampen fire activity over the last several days. Estimates and measurements show that anywhere from 1 to 2.5 inches of rain has fallen over the burn region since Sunday morning.

California Approves Microplastics Testing of Drinking Water Sources

California water regulators today approved the world’s first requirements for testing microplastics in drinking water sources — a key step towards regulating tiny fragments that are ubiquitous in the environment.

California Set To Become First in Nation to Test Drinking Water for Microplastics

Microplastic is everywhere.

The tiny particles that shed from clothing, food packaging and tires are in the air, the soil, the ocean and, almost certainly, your drinking water.

San Diego Lifts Boil Water Notice for Tierrasanta Neighborhood

The city of San Diego Monday lifted a boil water notice for about 600 residential customers in a portion of the Tierrasanta neighborhood who were affected by fluctuating water pressure issues following a burst pipeline last week.

Multiple tests showed no quality issues with water coming from the tap. The California Division of Drinking Water reviewed the findings and approved the lifting of the notice.

The Science Behind San Diego’s New Beach Water Quality Test

Today we’ll unpack the science behind a brand-new technology to measure water quality. San Diego is first in the world to use it, and it’s already sparked controversy.

The more sensitive test shows there’s more poo plaguing San Diego’s southernmost beaches than we could ever tell before — especially in summer when coastal cities like Coronado virtually never failed water quality tests using the old tests. In the case of South Bay, there is an obvious source of human sewage that’s plagued the coastline for decades: Tijuana.

Opinion: Summertime Is No Cure for the Environmental Blues

News about the environment rarely is good these days, but a string of grim developments locally, regionally and internationally cast a particular pall over the otherwise sunny arrival of summer.

Beaches from Imperial Beach north to Coronado were closed because of sewage discharges from Tijuana. The Colorado River’s reservoirs are so low that severe water cuts are on the horizon for much of the southwestern United States. And another climate conference, this one in Germany, pretty much went nowhere.

DNA-Based Water Testing System Launched for San Diego Beaches

San Diego County has started using new ocean water-quality testing technology intended to produce faster results and earlier warnings when bacteria reach unhealthy levels.

During a rollout of the DNA-based technology last week, county Board of Supervisors Vice Chairwoman Nora Vargas said the county plans to expand its use of the testing technology, known as droplet digital polymerase chain reaction, or ddPCR, to more than 70 miles of shoreline that the county samples and tests to help protect the public.

New San Diego Ocean Water Testing Much Faster

San Diego County is using new, high-tech tests that will allow officials to test ocean water and find out if that water is safe for swimming, in just one day. County supervisor Nora Vargas said the county is the first local government to get U.S. Environmental Protection Agency approval to use the new, sophisticated tests. The switch is the culmination of years of testing.

County Reopens Part of Imperial Beach Shoreline for Water Contact

County officials lifted a water contact closure for beaches from the south end of Seacoast Drive through Carnation Avenue in Imperial Beach, they said Saturday. Testing confirmed that water quality along the Imperial Beach shoreline meets state health standards following recent sewage contamination, according to the San Diego County Department of Environmental Health and Quality. The shoreline from the international border to the south end of Seacoast Drive, however, will remain closed. Sampling also must confirm that these areas are safe for water contact.

Sweetwater Authority Strives to Continue To Improve Water Quality In Its Service Area

Chula Vista, Calif. – Earlier this month, Sweetwater Authority (Authority) received calls from customers in the City of National City regarding discoloration of their drinking water. Upon receiving these calls, staff from the Authority’s Water Quality department deployed staff into the field to perform site investigations at several homes and businesses. An in-depth investigation led staff to find a significant change in system pressure, which was the result of a new water main that was being installed and a zone valve being inadvertently opened. Once this valve was closed, the water discoloration ceased. The Authority is working on continued enhancements to its best management practices to mitigate these types of events from occurring in the future.