Worst offenders

Below are the pools that have been closed by the county the most times in the last 3 1/2 years:

* Casa Linda, 8142 Broadway Ave., Whittier

* Sheraton Town House, 639 S. Commonwealth Ave., Los Angeles

* Casa Linda, 8210 Broadway Ave., Whittier

* Avenida 57 Apartments, 376 N. Ave. 57, Highland Park

* Highland Riviera, 332 S Ave. 60, Highland Park

* Los Feliz Lanai, 3717 Los Feliz Blvd., Los Feliz *

* Emerald Terrace, 160 S. Virgil Ave., Los Angeles **

* Apartments at 6815 Kelvin Ave., Canoga Park

The number of closures from Jan. 3, 2005, through May 5, 2008, includes instances in which inspectors have returned to a closed pool and continued its closure

* Management said it decided to drain the pool.

** The property changed owners last year and has since replaced the entire pool.

Source: County records, data analysis by Times staff writer Doug Smith