The Los Angeles Department of Water and Power (LADWP) has issued a boil water notice for a two-block radius in Koreatown following the detection of Escherichia coli (E. coli) bacteria. The contamination was identified through routine water quality testing on June 30, prompting health and safety warnings for residents within the affected area.
Affected Boundaries and Safety Measures
The notice impacts the area bounded by South Ardmore Avenue to the west, South Mariposa Avenue to the east, West Fifth Street to the north, and West Sixth Street to the south. Residents within these blocks are advised to use only boiled or bottled water for all consumption and food preparation needs.

According to the LADWP, tap water must be brought to a boil for one minute and allowed to cool before it is safe for use. This protocol applies to drinking, cooking, brushing teeth, making ice cubes, and washing produce. These measures are required to remain in effect until the agency provides an update lifting the notice.
The boil water notice was triggered by routine water quality testing conducted on June 30, which returned a positive result for E. coli bacteria.
Operational Response and Next Steps
The LADWP is currently conducting further testing to restore water quality in the impacted Koreatown neighborhood. While the agency has not provided a specific timeline for when the water will be cleared for normal use, they have committed to informing customers immediately once the notice is lifted.
The issuance of a boil water notice is a measure used by utility providers when pathogens like E. coli are detected. The immediate focus for authorities is to perform further testing to restore water quality before declaring the water supply potable again.
Frequently Asked Questions
Why was the boil water notice issued?
The notice was issued because routine water quality testing performed on June 30 returned positive results for the presence of E. coli bacteria.
What specific activities require boiled water?
Customers must use boiled or bottled water for drinking, cooking, brushing teeth, making ice cubes, and preparing food, such as washing produce.
How will residents know when it is safe to use the water?
The LADWP will notify customers as soon as the boil water notice is lifted following the completion of further water quality testing.
Are you taking the necessary precautions to ensure your household water is safe during this period?
