Water utilities in Altadena and Pacific Palisades are undertaking an arduous process of repressurizing their underground pipelines, testing for contaminants and attempting to flush them out.

Noah Haggerty is an environment, health and science reporter at the Los Angeles Times. With a background in physics, he has conducted research on spacecraft propulsion, fusion energy and plasma — the ...

The 15-page preliminary report offers the most detailed account yet about the failures inside the city's main water treatment ...