30 years ago LA's coastal waters were so contaminated that the damage was visible: fish with tumors and abrasions that looked like cigarette burns. Since then water quality has improved greatly thanks to better sewage treatment and tighter regulations on industry. But local waters are still among the most polluted in nation. One of the biggest problems these days is that rainstorms sweep pollution off our streets and into our waterways. And although local fish are healthier, there are still concerns about the impact of pollutants on aquatic life. KPCC's Ilsa Setziol has this report.
