Measured background levels of dioxin at sites in Michigan
as of November 1999

Location & TEQ in ppt

Lower Peninsula
LP-1 Brighton 5
LP-2 Eaton Rapids 18.1
LP-3 M-46 2.2
LP-4 Mt. Pleasant 1.1
LP-5 Harrison 1.25
LP-6 Gaylord 4
LP-7 Mackinaw City 14.5
LP-8 Port Huron 6.5
LP-9 I-69 Port Huron 2
LP-10 Manistee County National Forest 7.5
LP-11 Mason County 3.7
LP-12 Muskegon County 2.15
LP-13 Ionia 2.1
LP-14 Big Rapids 1.9
LP-15 Cadillac 0.6
LP-16 Kalkaska 2.2
LP-17 Monroe-Sterling State Park 2.4
LP-18 Elizabeth Park Marina 7.8
LP-19 Inkster 5
LP-20 Wayne State University 12.2
LP-21 Chandler Park-Detroit 13.8
LP-22 Gainsboro Park-Pleasant Ridge 3
LP-23 Flint 4.7
LP-24 Lansing 5.7
LP-25 Battle Creek 34.7
LP-26 Portage 3.6
LP-27 I-94 Median Sample-Lawrence 5.2
LP-28 Stevensville-Grand Mere S.P. 6.35
LP-29 Niles 7.3
LP-30 Vicksburg 14.9
LP-31 Hillsdale 10
LP-32 Leelanau State Park 1.95
LP-33 Traverse City 5.9
LP-34 Karlin 33.8
LP-35 Sandusky Comm. Park 13.3
LP-36 Port Austin-Jenkins Park 0.9
LP-37 Huron Co.-Sebewaing Park 2
LP-38 Bay City 12.2
LP-39 Standish 10.1
LP-40 Nayanguing Point Sag. Bay 1.8
LP-41 Auburn 7.9
LP-42 Saginaw Hoyt Park M-46 and M-13 13.7
LP-43 Loomis Park-Jackson 6.5
LP-44 Ann Arbor-Fuller Rec. Area 3.5
LP-45 Livonia-Bicentennial Park 4.05
LP-46 Pontiac-Oakland Park 4.5
LP-47 Oscoda 4.1
LP-48 Alpena-North Point 4.3
LP-49 Alpena-Lafarge Area 5.5
LP-50 Rogers City 2.8
LP-51 Montmorency County 3
LP-52 Au Sable River at M-33 0.8
Upper Peninsula
UP-1 Pte. Aux Chenes Bay 3.4
UP-2 Hog Island 1.9
UP-3 Seney Wildlife Refuge 3.3
UP-4 Seney Wildlife Refuge 35
UP-5 Munising/M-28 1.7
UP-6 Munising/West Side 1.7
UP-7 Seney Wildlife Refuge 1.45
UP-8 Escanaba 1.1
UP-9 Iron Mountain 0.7
UP-10 US-41/Humbolt Road 7.6
UP-11 Marquette 3.6
UP-12 Manistique 8.3
UP-13 Hancock-Keweenaw 2.1
UP-14 Ontonagon 0.5
UP-15 Watersmeet 2.5
UP-16 Menominee 2.2

431.1/68 = 6.339

3 highest: LP-25 =34.7
3 lowest: LP-15=0.6

Click here for map of Michigan background dioxin sample locations and results as of 11/99 (large pdf file)

Tittabawassee Flood Plain MDEQ Phase 1 sampling: Average 998 ppt, highest 7,261 TEQ
Tittabawassee Flood Plain MDEQ Phase 2 sampling: Average 799 ppt, highest 3,400 TEQ
Tittabawassee Flood Plain MDEQ Phase 3 sampling: Average 309 ppt, highest 5,660 TEQ

Source: Data: MDEQ November 1999 study.   This page composition: Ecology Center & TRW

For additional articles like this one, go to the Tittabawasse River Watch web site for complete coverage of the Tittabawassee River Dow Chemical dioxin contamination saga.. The source organization's web site link is listed above. The Newspaper / Media page of our site contains an extensive archive of media articles dating back to January 2002. The Newspaper / Media page may be accessed by scrolling down to the bottom of the CONTENTS section and clicking on the Newspaper/Media link.