Here’s the release from the Metro Wastewater Reclamation District (Kelly Merritt):
The Metro Wastewater Reclamation District (Metro District) honored 19 metro area organizations for perfect compliance with their industrial wastewater discharge permits on May 8, 2019. Water Remediation Technology, LLC, received a Platinum Award for perfect compliance for five consecutive years (2014 through 2018).
The following were recognized with Gold Awards for perfect compliance from January through December 2018:
Acme Manufacturing Company, Inc.
Advanced Circuits, Inc.
Ball Metal Beverage Container Corp.
CoorsTek, Inc.
CW Elaborations, Inc.
Denver Metal Finishing
G & K Services, A Division of Cintas
Industrialex Manufacturing Corp.
Majestic Metals, LLC
Packaging Corporation of America
Pepsi Beverages Company
RMO, Inc.
Rocky Mountain Bottle Company, LLC
Safeway, Inc., Denver Beverage Plant
Swire Coca-Cola, USA
United States Mint
Upsher-Smith Laboratories, LLC
Wanco, Inc.The federal Pretreatment Regulations under the Clean Water Act require the Metro District to have an Industrial Pretreatment Program to control the discharge of industrial wastes to the sanitary sewer system. One of the ways that the Metro District controls these discharges is through issuance of industrial wastewater discharge permits.

What Metro water district does this article refer to ?
The Metropolitan Wastewater Reclamation District in Colorado (Denver Area).