Eight Wisconsin Counties now Meet
Ozone Standard

Substantial Regulatory Relief at Hand

Print Version

Bob Fassbender

The Hamilton Consulting Group

Nov. 3, 2006

© 2006 The Hamilton Consulting Group

Substantial regulatory relief is just around the corner for businesses and citizens located in those Wisconsin counties previously violating the federal ozone standard. After decades of straining under federal Clean Air Act ozone mandates, virtually the entire state of Wisconsin now meets the stringent new 8-hour ozone standard – years before the 2009/10 compliance deadlines. Those two counties that barely missed hitting the standard (Door and Sheboygan) are on a glide-path to do so before the upcoming deadline.

Mapping the Road to Compliance
(Click on graphics to Enlarge Maps)

2002 Ozone Nonattainment Projection	2003-05 Actual Ozone Nonattainment Areas	2006 Projected Ozone Nonattainment Areas

Executive Summary

This report uses preliminary ozone data for the 2006 ozone season, which ended on September 30. Wisconsin DNR must assure the 2006 data meets EPA quality assurance criteria, but the significant progress in reducing ozone levels over the past years is uncontestable. The table below shows the status of those monitoring sites that at one time registered ozone levels at or above the 85 parts per billion (ppb) standard, or that were otherwise in a nonattainment area.

What is particularly astonishing is that Kenosha County has met the standard – the Chiwaukee monitor registered 101 ppb ozone reading for 2003. Having that monitor come into compliance by dropping 18 ppb in only three years was crucial. For the six-county Milwaukee-Racine Consolidated Metropolitan Statistical Area (CMSA), if any one monitor in any of the six counties violates the standard, then all six counties would be considered nonattainment.

Without doubt, substantial emissions reductions by businesses and citizens across the Midwest have resulted in real and enduring reductions in ozone levels. And we’re not done. New programs already on the books but not yet implemented will ensure Wisconsin’s air quality is further improved. For example, EPA’s new Clean Air Interstate Rule (CAIR) will result in a 60 percent reduction in ozone-forming NOx emissions across the U.S. from the electric utility sector. Federal mobile and area source programs such as EPA’s Tier 2/low sulfur gasoline rule, highway diesel rule, and the non-road diesel rule, combined with fleet turnover, also will result in substantial future emission reductions.

At this time, virtually everyone in Wisconsin is breathing air meeting the stringent federal health standard for ozone. In the near future, the entire state will meet the standard as those limited, but stubborn air quality monitors in Door and Sheboygan counties come into compliance. The added benefit earned by our cleaner air will be meaningful regulatory relief for Wisconsin businesses.

The regulatory benefits associated with ozone compliance are two-fold. First, meeting the ozone standard allows DNR to unwind some of the more serious regulatory hurdles now facing businesses wishing to locate or expand in Wisconsin. For example, no longer required will be mandates on certain new or modified sources to install the most stringent control technology and to obtain reductions from other sources that offset their expected emissions. Second, reaching attainment will preempt the need to develop an Attainment Demonstration State Implementation Plan (Attainment SIP) and related mandates for those counties now in compliance.

The Attainment SIP was due EPA by June 15, 2007. Initially, DNR proposed that draconian mandates be imposed on Wisconsin businesses. Driven by flawed modeling, DNR projected that severe reductions from Wisconsin utilities were necessary to meet the ozone standard. In turn, Wisconsin businesses and homeowners across the state would have seen staggering increases in energy costs. New mandates on businesses in the ozone nonattainment areas also were proposed to be layered over existing regulatory programs.

Wisconsin industry argued for well over a year that DNR’s assessment of required ozone measures was deeply flawed. Air quality trends seen before this year already evidenced that no further mandates would be required to meet the ozone standard. (See Hamilton Consulting’s Ozone Update; Nov. 1, 2005.) The fact that we have come into compliance years before the compliance deadlines should finally debunk DNR’s assertions that severe mandates are required.

Additional challenges are pending, however. DNR and EPA need to recognize that Door and Sheboygan counties will reach attainment without the imposition of additional mandates in or upwind of those counties. In this regard, DNR and EPA need to repudiate the junk science modeling used to date to project that even the most severe reductions would not have resulted in compliance. In addition, while long-term compliance is assured, we will have to submit what is called a Maintenance SIP to assure compliance continues over the near-term. These challenges will be met as our significant improvements in air quality are not a fluke but the result of substantial and permanent reductions in ozone-forming emissions.

I.  The Ozone Nonattainment Designation Process

 Ozone regulatory requirements are imposed when a county is designated as an ozone nonattainment area. Mandates imposed in nonattainment areas target all sectors, including manufacturing and utilities (stationary sources), smaller “areas” sources, as well as mobile/transportation sources. The new 8-hour ozone standard was finalized in 2002 triggering the process of designating areas either nonattainment or attainment. Generally, an area is in violation of the standard and considered nonattainment if the average fourth highest 8-hour ozone reading at any monitor within the area over the prior three years is 85 ppb or higher. This average reading for any three-year period is considered the area’s “design value.”

 A.  DNR’s 2003 proposed 8-Hour Ozone Nonattainment Designations. Under the Clean Air Act, states must submit proposed nonattainment designations for areas violating the new 8-hour standard. In 2003, DNR proposed to designate as nonattainment numerous Wisconsin counties in compliance with the standard because DNR projected a violation or because they were close to noncompliance and contributing to adjacent nonattainment violations. It was the first of many instances in which DNR overstated our ozone problem.

 The map below illustrates DNR’s initially proposed nonattainment areas. The ozone levels noted reflect an average of the 2002-03 ozone readings, which, if held true would have in fact caused 14 counties to be deemed nonattainment.

2002 Ozone Nonattainment Projection (Click map to Enlarge)

B.  2004 Nonattainment Designations & Classifications.  On April 15, 2004 EPA designated nonattainment areas throughout the country that exceeded the 8-hour ozone standard. This initial designation reflected actual 2001-03 ozone data, which resulted in 10 Wisconsin counties being designated nonattainment. The map below shows those counties and their 2001-03 design values.

2003-05 Actual Ozone Nonattainment Areas  (Click map to Enlarge)

As part of the designation process, EPA set forth criteria to classify the degree of noncompliance based on the area’s design value. Generally, more mandates are imposed on areas with higher classifications. Below is the listing of Wisconsin’s nonattainment counties and their respective classification and compliance deadlines. These designations and classifications remain in effective until EPA approves a redesignation request based upon 2004-06 monitoring data.

¹ Washington and Waukesha counties were considered nonattainment despite compliance with the standard because they are part of the six-county Milwaukee-Racine CMSA.

II.  Nonattainment Status using 2004-06 Monitoring Data

 A.  2006 Preliminary Nonattainment Status. As noted above, the average of the fourth highest ozone readings for 2004-06 will determine the current design value/compliance status of Wisconsin counties. Recall also that any violating monitor (85 ppb or higher) in any Milwaukee-Racine CMSA county generally results in all six counties being considered nonattainment. The following table evidences the “projected” design values. While using actual 2004-06 data, these design values should be considered preliminary until the 2006 monitoring data is quality assured, including verification of the requisite number of monitoring days.

Because all monitoring sites in the Milwaukee-Racine CMSA meet the standard, the entire CMSA can be redesignated to attainment. Likewise, Kewaunee and Manitowoc counties separately meet the standard. Door and Sheboygan remain in noncompliance, but with a significant trend line toward compliance. The map below reflects the projected nonattainment status for Wisconsin and respective 2004-06 design values.

2006 Projected Ozone Nonattainment Areas (Click map to enlarge.)

B. Trends in Ozone Nonattainment Status.  The charts below demonstrate the dramatic ozone improvements made over the past few years in key counties. Worth noting are the improvements at “border county” monitoring sites. Those counties were noted by DNR as “probable violation areas” or “near-violation areas” in 2003. None of these counties are even remotely close to violating the standard at this time. Unfortunately, recent press coverage continues to erroneously note that Dane and Brown counties, for example, are on the verge of violating the standard.

 As would be expected, the drastic reductions result in a significant reduction in the number of counties considered nonattainment. The below chart compares the number of counties DNR initially proposed to be designated nonattainment using 2001-02 ozone data, with the numbers of counties in nonattainment based on actual monitoring data. That is, in 2002 DNR proposed 20 counties be considered nonattainment. In 2006, only two counties are not meeting the standard. However, the official redesignations must undergo a rigorous EPA approval process, discussed in more detail below. So the current, official designations remain those approved by EPA in 2004, based on 2001-03 monitoring data (i.e., 10 counties).

Milwaukee County

Ozaukee County

Racine County

Kenosha County

Door County

Kewaunee County

Manitowoc County

Sheboygan County

Brown

Dane

Jefferson

Rock

Walworth

Also noteworthy is the significant ozone improvement being seen across the Midwest. Below is a map from EPA’s web site that shows nonattainment counties in EPA Region 5 states at the time of EPA’s initial designations. Close to 30 counties on or near Lake Michigan were in nonattainment.

 According to EPA representatives, only Door, Sheboygan, and Allegan (Holland, Michigan) counties on or near Lake Michigan currently violate the standard using 2004-06 monitoring data. As Wisconsin goes from 10 to two nonattainment counties, Mich