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Tribar Hexchrome Release: EGLE Response

EGLE staff person leaning over an overpass, dipping sampling equipment into the Huron River to collect a water sample due to Tribar Manufacturing release
Environment, Great Lakes, and Energy

Tribar Hexchrome Release: EGLE Response

The content on this page is no longer being updated, but Michigan EGLE is preserving it as a historical resource. 

For assistance, please contact our Environmental Assistance Center at or 800-662-9278.

The Michigan departments of Health and Human Services (MDHHS) and Environment, Great Lakes, and Energy (EGLE) and local officials are working together to protect residents in Monroe, Oakland, Livingston, Wayne, and Washtenaw counties following a release of hexavalent chromium to the Wixom Sewage Treatment Facility from Tribar Manufacturing in Wixom. The sewer feeds the Wixom wastewater treatment plant, which discharges to the Huron River system.

EGLE was notified at 3:21 p.m. August 1 by Tribar that it had released several thousand gallons of a liquid containing 5% hexavalent chromium into the sewer system. The company says it discovered the release Monday but indicated it may have started as early as Saturday morning according to Wixom city officials. 

Testing of the Huron River has been ongoing and of more than 145 water samples collected throughout 42 river miles since the release, three came back with detections of hexavalent chromium – two detections in Milford’s Hubbell Pond and one in the middle of Kent Lake. The Kent Lake detection, completed by lab analysis – was 5 parts per billion (ppb) – just at the detectable limit of 5 ppb. The two Hubbell Pond detections were 11 and 9 parts per billion. All three were at or below values to protect aquatic life.


MI Toxic Hotline, 800-648-6942 for hexavalent chromium, potential health effects, or exposure questions

EGLE Environmental Assistance Center, 800-662-9278 for drinking water and surface water questions


Summary of monitoring activities

What is hexavalent chromium?

Hexavalent chromium is a form of the metallic element chromium. Chromium is a naturally occurring element found in rocks, animals, plants, soil, and volcanic dust and gases. It is used in many industries, including electroplating, welding, and chromate painting.

Hexavalent chromium, also referred to as hexchrome, is a known carcinogen that can cause a number of adverse health effects through ingestion, skin contact or inhalation.


A screenshot from the Tribar Hexchrome release map
A screenshot from the Tribar Hexchrome release map

Tribar Release Sampling Results interactive map

View results from EGLE's surface water and sediment monitoring results. Layers include Hexavalent Chromium, Total Chromium, PFAS, PFAS sediment, and metals sediment results.