Here’s what’s making waves in Los Angeles’ water world right now. In the last 48 hours, LA enjoyed a rare burst of September rainfall, marking the end of a record-long dry streak in the city. According to the Los Angeles Almanac, downtown Los Angeles logged 0.01 inches of rain on Saturday, September 27, bringing the total for September so far to just 0.10 inches. That’s not a soaking, but considering LA’s usually parched late-summer weather, any rain is newsworthy.
This rain came courtesy of a dissipated tropical storm whose remnants swept up from the Pacific, also causing localized flooding and even triggering mudslides in inland areas like San Bernardino County. The National Weather Service said most of LA could expect between a quarter- to a half-inch of rain, and as always, Angelenos scrambled to find their long-lost umbrellas.
Rain like this is precious in Southern California for more reasons than wet sidewalks. The precipitation briefly eased fears about escalating fire risk, crucial as LA enters the thick of wildfire season. Meteorologist Rich Thompson described the rainfall as a welcome anomaly, helping bolster late-September humidity and potentially lowering immediate fire dangers. Still, most areas marked only modest rainfall totals, and there remains a regional flood watch for certain parts of the county.
On the water supply front, the City of Los Angeles is updating its Safe Clean Water Program, requiring stricter review of community-proposed water improvement projects. Applications now need a city Letter of Support or Non-Objection, part of wider efforts to improve transparency, watershed coordination, and long-term water quality. This policy aims to strengthen the way local nonprofits and community groups help shape water solutions for neighborhoods across the Santa Monica Bay and LA River areas.
But while the quality of drinking water remains high—no boil advisories or contamination alerts have been issued—many residents continue to feel pain at the tap. According to Water Education Colorado, water bills in LA County have jumped 60 percent over the last decade. That’s one cloud that hasn’t cleared.
The ocean water quality rain advisory, triggered by the showers earlier this month, officially ended as of September 21. LA County Public Health reminds beachgoers that while post-rain advisories have cleared for now, some testing results remain pending following the recent precipitation. So if you plan to dip your toes in, check for updates, as storms can cause temporary runoff spikes.
Behind the scenes, the city is tracking impacts of AI and data centers on water supplies as well, since cooling high-tech infrastructure puts new pressure on local resources. With new bills in the works, your cloud storage could soon come face-to-face with California’s water realities.
Finally, for those seeking a refreshing drink straight from the tap, the Los Angeles Department of Water and Power assures the public that city drinking water meets all safety and quality regulations, and delivery systems remain stable. As always, ongoing precipitation and local climate patterns are key factors in shaping future supplies.
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