Welcome to the Scio Residents for Safe Water (SRSW) Website.

Our mission is to protect and preserve the groundwater in Scio Township.

Monthly CARD meetings

CARD is the Coalition for Action on Remediation of Dioxane, formed in 2006 by local governments and citizen stakeholders to better jointly understand and address Gelman dioxane site issues.

SRSW provides technical support for CARD.

Recent Events

03/22/2021 Gelman Court Hearing via Zoom

Monday, March 22, 2021

Mlive coverage - Michigan Daily coverage

03/18/2021 Community Information Session

next steps by EPA & EGLE regarding the Gelman dioxane contamination

Thursday, March 18, 5:00-7:00 pm via Zoom

Mlive coverage - Michigan Daily coverage - Zoom video

03/02/2021 CARD/EGLE Quarterly Meeting-via Zoom


CARD (Coalition for Action on Remediation of Dioxane) -- Official local government/citizen stakeholder group
-- Subscribe to CARD email notices

EGLE's (DEQ's) Gelman Website EGLE docs list archive
Join the EGLE-DEQ-Gelman Listserv to get EGLE/DEQ emails

USEPA Gelman website -- FAQs page
-- Superfund Cleanup Process and Community Guide

City of Ann Arbor 1,4-dioxane fact sheet​ and FAQs
-- [more]

Ann Arbor City Council Members

Washtenaw County website
-- County's Gelman plume map - dioxane topic
-- Washtenaw County Public Health Factsheet on 1,4-Dioxane

Scio Township website Gelman dioxane cleanup

Ann Arbor Township website
--WEMU Green Room radio shows about dioxane

Contact Your State Legislators

Contact Michigan Governor and other departments

Learn how to test your Well Water (scroll down)

U-M SEAS/Gala Briefing on Dioxane Plume

Water on earth Infographic

Pall/Gelman 1,4-dioxane contamination site

04/28/2019 Ann Arbor Earth Day

We're learning interesting tidbits from Gelman Science's early days from its former employees, like how the company passed out car wash coupons when the wind changed direction and blew the dioxane-laden sprinkler water over its parking lot.

Click here if you have a personal story like that to share (confidentially).



May 4, 2021, hearing related to the Gelman litigation.

"At this hearing, Judge Connors ruled that the terms of the proposed Fourth Amended and Restated Consent Judgment (Proposed 4th CJ) would be implemented.

The judge further stated that he would have quarterly meetings with the state, Gelman and the intervenors to assess progress and consider revisions. The following items are included in the Proposed 4th CJ, to be implemented:

1. Additional monitoring and mapping of the contaminated groundwater.

2. Removal of additional dioxane from areas of high concentration downgradient of the source.

3. Removal and treatment of additional dioxane at the source area on the Gelman Property.

4. Expansion of the Prohibition Zone.

5. Incorporation of two new treatment technologies – phytoremediation and heated soil vapor extraction.

6. Reduces the drinking water criteria from 85 to 7.2 parts per billion of dioxane in groundwater; in agreement with changes at the state level in 2016.

Beginning Sept. 1, 2021, the parties must report back quarterly to the court for a progress update."

(from City of Ann Arbor Water Quality Newsletter-Volume 3, Issue 23 | June 2021)

Status of the other matters of disagreement relating to the proposed 4th CJ settlement apparently will be resolved at quarterly hearings while the interveners remain parties in the case ... and the EPA intervention continues on a separate path.

Gelman Site in Urbanized Area

The Gelman/Pall/Danaher site is unique in the amount of dioxane in the groundwater moving in several directions within an increasingly urbanized area with so many homeowner wells as their sole source of water... links to map images:

1992 vs 2020 dioxame plum...posed 500 ppb termination

Proposed 4th Consent Judgment Settlement & Responses

Documentation & Events) 8/31/2020 ... continuing

Rejected by Washtenaw County, Scio Township & City of Ann Arbor

One (of several) Unacceptable Conditions of Proposed 4th CJ Settlement: 500 ppb termination criteria


Gelman Data - interactive on Tableau Public (updated 4/4/2021 with data thru 2020)

Timelapse video of dioxane readings for all years 1986-2020

(Not including recent, unreported shallow dioxane sampling by Gelman.)

1 meter height represents 1 ppb of dioxane