WATCH: Flush o' the Irish? Kelsey shows us green dye is for more than St. Patrick's Day.

Chicago can have its green river. Water Quality and Industrial Surveillance Investigator Kelsey Amidon shows us how we go green (green dye, actually) to protect water quality.

Fluorescent dye helps our investigators trace the source and destination of flows in our streams and sewers, and the glowing-green dye is even eco-friendly.

NEWS: Indictment alleges company illegally discharged zinc, chrome into sewer system

Sewer District Water Quality & Industrial Surveillance (shown above) and Westerly Wastewater Treatment Plant staff assisted with the investigation that led to today's indictment.

An indictment was filed in federal court today charging Thomas E. White, 49, of Fairview Park, and Kelly Plating Company with making illegal discharges with high concentrations of metals such as chrome and zinc into the sewer system.

The indictment alleges that Kelly Plating ensured all of its pollution control equipment—which was "was operated properly" on weekdays—was bypassed on weekends, discharging partially treated waste and high concentrations of chrome and zinc directly to the sewer system.

"[We have] made significant investments to improve water quality in our region, and will not tolerate actions that jeopardize that investment," said Sewer District Executive Director Julius Ciaccia in a press release from the U.S. Department of Justice.

The Sewer District, its stringent industrial monitoring program and Westerly Wastewater Treatment Plant staff were proud to contribute to the investigation with partners Ohio EPA, U.S. EPA, and the Ohio Bureau of Criminal Investigation.

Read the full release.

OMG! (Oh my! Green!): Eco-friendly dye helps trace sources of pollution

The green you see is not pollution. But it can help identify pollution sources.

When our Water Quality & Industrial Surveillance team is called in to find the source of a hazardous spill or an illegal discharge—like this one in Rocky River last year—the crew conducts dye testing like this. Investigators release an environmentally safe dye into the collection system, most commonly storm sewers in the area, to confirm the flow's source, route, and ultimate destination.

If you ever see a suspicious discharge in a Northeast Ohio waterway, you can contact our Environmental & Maintenance Services Center at (216) 641-6000 or tweet @neorsd.

NEWS: Fish kill investigation benefits from Sewer District's first-responders

Senior Investigator Seth Hothem tests water quality near the fish-kill scene April 25.

The Northeast Ohio Regional Sewer District is pleased that the grand jury returned indictments against Renato and Teresina Montorsi for allegedly dumping toxic cyanide into a storm sewer, deliberately poisoning tens of thousands of fish last April. This intentional act is a clear infringement of the Clean Water Act.

In Thursday’s story, Grafton couple accused of causing fish kill, the good work performed by local, state and federal agencies was highlighted. Unfortunately, the Sewer District’s exceptional performance was overlooked at the press conference: our employees played a key role in this investigation.

Our employees were among the first investigators on the scene. During the critical first hours, our field investigators collected water samples from the East Branch of the Rocky River and its tributaries. Our laboratory staff quickly and expertly analyzed samples collected by our staff and Cleveland Metroparks rangers.

UPDATE: Sewer District assists in fish-kill investigation along Rocky River

"We’ll continue to work on this until we exhaust all our leads. We are working with other entities as well. Cleveland Metroparks, Ohio EPA, Ohio Department of Natural Resources, everyone is working together to try and figure this one out." Sewer District Director of Watershed Programs Frank Greenland spoke to several media outlets this afternoon regarding the ongoing investigation of the possible fish kill along a stretch of Rocky River in the Cleveland Metroparks. The District is collecting water samples to aid in the investigation.

Here are stories that ran this evening on WKYC, WEWS and FOX8. UPDATE 2012 5/1: The Strongville Post featured a story in today's edition.