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The Gelman Site is an area of groundwater contamination in Washtenaw County that includes portions of the City of Ann Arbor, and Scio Township. The groundwater is contaminated with the industrial solvent 1,4-dioxane (dioxane). The contamination plume encompasses a total area that is approximately 1 mile wide and 4 miles long.
This plume is not a new problem. From 1966 until 1986, Gelman Sciences, Inc. manufactured medical filters using dioxane in the manufacturing process. In 1985, dioxane was discovered in residential drinking water wells in the area. The Michigan Department of Environment, Great Lakes, and Energy (EGLE) with assistance from the Washtenaw County Health Department has been tracking the plume and overseeing investigation and remediation activities at the site for over 30 years.
This EGLE operated mapping application provides Historic and Current information related to the investigation and remediation of the 1,4-Dioxane groundwater contamination in Scio Township and the west part of the City of Ann Arbor in Washtenaw County.
View the interactive map to explore the Gelman sciences site of 1,4 dioxane contamination.
The data used in this map is available to download and to view as a table.
Find all of EGLE's web maps and open data centralized to one location.
General questions:
Andrea Muñoz-Hernandez
MunozHernandezA@Michigan.gov or
517-599-7525
NPDES Permit:
Bridgett Carver
CarverB@Michigan.gov or 517-257-7380
Drinking Water:
Chloe Morey
MoreyC@Michigan.gov or 517-243-8165
On June 20, 2024 at 6 pm the Water Resources Division held a meeting - Recording of the Public Hearing Regarding the Proposed Reissuance of National Pollutant Discharge Elimination System Individual Permit for Gelman Sciences LLC - Wagner Rd facility (NPDES IP No. MI0048453)
This was a virtual information meeting and public hearing to provide an opportunity for the public to provide comments on the proposed reissuance of the NPDES surface water permit for Gelman Sciences LLC - Wagner Rd, which authorized the discharge of a maximum of 1.872 million gallons per day of treated groundwater to an unnamed tributary of Honey Creek. A short information session was held as part of the hearing prior to taking comments. All interested parties were invited to share comments on the proposed NPDES permit. The permit was issued on September 30, 2024.
For additional information, contact:
Jessica Stiles
EGLE Water Resources Division - Permits Section
P.O. Box 30458
Lansing, Michigan 48909,
telephone: 517-525-9437
email: StilesJ1@Michigan.gov
The last public meeting was hosted by Scio Township and held on February 17, 2022; EGLE was invited to participate.
The following table contains sampling results, reports, and other documents associated with the Gelman Sciences, Inc. site.
Use the interactive table below to find documents based on keyword, or click the column headings to sort alphabetically or by date.
Updated: Newly added items are indicated with yellow highlight - sort by 'Date Item Posted' to see the latest postings first. Note that documents posted prior to February 2023 do not have a date item posted.
| Year | Type | Name | Date Item Posted |
|---|---|---|---|
| 1992 | Legal | State-Gelman Oct 1992 Consent Judgment | |
| 1996 | Legal | State-Gelman CJ 1st Amendment Sept 1996 | |
| 1998 | Data | 1998 - Historical residential drinking water monitoring results | |
| 1999 | Legal | State-Gelman CJ 2nd Amendment Oct 1999 | |
| 1999 | Data | 1999 - Historical residential drinking water monitoring results | |
| 2000 | Data | 2000 - Historical residential drinking water monitoring results | |
| 2001 | Data | 2001 - Historical residential drinking water monitoring results | |
| 2002 | Data | 2002 - Historical residential drinking water monitoring results | |
| 2003 | List of Recent Documents Provided To Information Repositories | Documents Provided To Information Repositories - December 16, 2003 | |
| 2003 | List of Recent Documents Provided To Information Repositories | Documents Provided To Information Repositories - October 21, 2003 |
Paper copies of important documents were sent to the following locations between 1992 - 2015; once this webpage was established, documents were posted here for easier public access.
343 South Fifth Avenue
Ann Arbor, MI 48104
734-327-4200
100 N. Fifth Avenue
Ann Arbor, MI 48103
Contact: Mary Gordon, 734-994-8286
827 North Zeeb Road
Ann Arbor, MI 48103
734-665-2123
Environmental Health Division
705 North Zeeb Road
Ann Arbor, MI 48103
Contact: Michael Gebhard, 734-222-3855
