1997 Eight-Hour Ozone Standard (80 ppb)
This standard was revoked by USEPA on April 6, 2015.
The Illinois Environmental Protection Agency (IEPA) prepared the Eight-Hour Ozone Attainment Demonstration for the Metro-East Nonattainment Area and submitted it to U.S. Environmental
Protection Agency (USEPA) Region 5 in June 2007. The Attainment Demonstration is currently under review by USEPA.
Since submitting the Eight-Hour Ozone Attainment Demonstration, monitoring data showed that the Metro-East attained the 80 parts per billion (ppb) standard. IEPA submitted a
Maintenance SIP for the Metro-East Ozone Nonattainment Area. Along with SIP submittal, IEPA requested for redesignation of the area as in attainment of the 80 ppb, 1997 eight-hour
ozone standard. USEPA approved this request and maintenance plan in June 2012.
The Missouri Department of Natural Resources (MoDNR) prepared Redesignation Demonstration and Maintenance Plan for the Missouri portion of the St. Louis eight-hour ozone nonattainment
area. It was submitted to USEPA Region 7 in April 2014. USEPA approved this request and maintenance plan on February 20, 2015.
2008 Eight-Hour Ozone Standard (75ppb)
In March 2008 USEPA revised the eight-hour ozone standard, setting it at 75ppb. From 2009-2011, USEPA re-examined the 2008 standard. In September 2011, the USEPA decided to retain
this standard. However, USEPA is continuing their review of the standard as required by the Clean Air Act.
In July 2012, USEPA designated the eight-county St. Louis area (MO-IL) as a marginal non-attainment area. Missouri and Illinois have until December 31, 2015, to attain the 2008
eight-hour ozone standard. USEPA released a proposed rule on how to implement this standard andState Implementation Plan requirements in June 2013. Missouri prepared an early progress
plan for their portion of the non-attainment area and submitted it to USEPA Region 7 in 2013. USEPA is currently reviewing this plan.
Based on 2013-2015 monitoring data, the St. Louis area has met the 2008 ozone standard. In September 2016, Missouri submitted to EPA Region 7 both a request for the redesignation of
the Missouri portion of the St. Louis ozone non-attainment area to attainment and a Maintenance Plan delineating steps for this area to continue to attain this standard. These items
are under review by EPA. The Illinois Environmental Protection Agency (Illinois EPA) is also working on a redesignation to attainment request and a Maintenance Plan for the Illinois
portion of the St. Louis non-attainment area for the 2008 ozone standard.
2015 Eight-Hour Ozone Standard (70 ppb)
On October 1, 2015, EPA strengthened the eight-hour ozone standard, setting it at 70 ppb. States are to submit recommendations on designations (attainment of standard, non-attainment
or unclassifiable) and associated boundaries to EPA by October 1, 2016. For the Metro-East, Illinois EPA expects to propose that Madison, Monroe and St. Clair Counties be in the
ozone non-attainment area boundary. It will be recommended that all other counties in Illinois be designated as attainment/unclassifiable. Illinois is expecting that EPA will
designate the Metro-East as marginal non-attainment with a 2020 attainment date. Missouri is recommending that Franklin, Jefferson, St. Charles and St. Louis Counties and the City
of St. Louis be designated as non-attainment for the 2015 ozone standard. For each of the remaining Missouri counties, unclassifiable/attainment is the recommendation.
The boundary recommendations for each state are to then be submitted to EPA by October 1, 2016. EPA will review the recommendations and propose their designations no later than June
2017 and finalize the designations by October 1, 2017. EPA will be looking at 2014-2016 ozone season data and design values for each monitor.
1997 Annual Fine Particles (PM2.5) Standard
On May 23, 2011 USEPA issued a final rule stating that the St. Louis PM2.5 non-attainment area had attained the 1997 annual standard based on 2007-2009 quality assured monitor data.
The Supplement/Revision to the Redesignation Demonstration and Maintenance Plan for the 1997 PM 2.5 for the Missouri portion of the St. Louis Metropolitan Area was prepared by MoDNR and
submitted to USEPA in March 2014. It is currently under review by USEPA. Illinois continues to work on its maintenance plan.
2012 Annual PM2.5 Standard
On December 14, 2012, the USEPA Administrator finalized the federal rule revising the annual PM2.5 standard from 15 ug/m3 to 12 ug/m3. In December 2013 Missouri and Illinois prepared
recommendations for areas w hich are in attainment of the new standard, in non-attainment or unclassifiable. Missouri recommended to USEPA that all counties be designated as
attainment or unclassifiable. Illinois has proposed that Madison, Monroe and St. Clair Counties and Baldwin Township in Randolph County to be placed in NA status.
As of April 15, 2015, USEPA found that it could not determine, based on available data, whether the eight county St. Louis region (MO-IL) near Baldwin Township, Randolph County, IL,
met the 2012 annual standard or was contributing to a nearby violation. USEPA has identified this area s "unclassifiable." When Missouri and Illinois have three calendar years
of monitor data (2015-2017), they each can make recommendation to USEPA about attainment or nonattainment.
In October 2008, the 1978 lead standard was strengthened to 0.15 ug/m3. USEPA in 2010 designated as non-attainment the area within the city limits of Herculaneum in Jefferson
County. Located in Herculaneum is the Doe Run Company's primary lead smelter. In April 2013 Missouri submitted to USEPA an Attainment Demonstration Plan for the 2008 lead
standard along with a Consent Judgment. The Attainment Demonstration shows that the area will achieve compliance with the lead standard no later than five years after non-attainment
designation. Under the 2011 Federal multi-media Consent Decree between the Doe Run Company, USEPA and the state of Missouri, Doe Run agreed that at their Herculaneum facility the
sinter plant operation would be shut down by December 31, 2013 and blast furnace operations would be shut down by April 30, 2014. These actions are a major component of the 2013
Attainment Demonstration. Attainment Demonstration and signed consent judgement were submitted to USEPA in April 2014. USEPA approved the Attainment Demonstration, effective
November 19, 2014.
In Illinois, USEPA designated Granite City and Venice Townships as non-attainment of the 2008 lead standard. Illinois is working with the affected facility on a state rule (State
Implementation Plan). The rule described action(s) to bring this area into attainment. The rule was to be submitted to the Illinois Pollution Control Board and was adopted in
2014. Illinois has submitted the final lead rule to USEPA and an update to a previous lead State Implementation Plan. The facility in Granite City has been issued a
construction permit to install controls so it can comply with the state lead rule. USEPA approval is anticipated.
Sulfur Dioxide (SO2) Standard
In 2010, the USEPA revised the primary SO2 standard, setting it at 75 ppb. Missouri and Illinois submitted their recommendations for areas considered to be in attainment of the standard,
non-attainment and unclassifiable in the summer of 2011. The USEPA proposed guidance for modeling requirements for maintenance plans and SIPs in October 2011. As a result of comments
received from the states during June 2012, the USEPA met with states, tribes, industries and other interested parties on how to refine their modeling approach for the 2010 standard.
For Round 1 designations, 2010-2012 monitoring data was used. In Missouri, a portion of Jackson County (Kansas City area) and a portion of east-central Jefferson County were
designated as non-attainment. Based on 2013-2015 monitoring data, Jefferson County has attained the SO2 standard. MoDNR is preparing a redesignation request. Jackson County is also on track to meet the attainment deadline. In Illinois there were no locations within the St. Louis region identified as being in non-attainment of this standard. Areas near Pekin in central Illinois and Lemont near Chicago were designated as non-attainment in Round 1.
In 2015 EPA entered into a consent decree with the Sierra Club and Natural Resources Defense Council which set deadlines for EPA to complete additional designation rounds for the 2010 SO2 standard. EPA is to complete Round 2 designations by July 2, 2016, Round 3 by December 31, 2017 and Round 4 by December 31, 2020. The deadlines for Round 3 and Round 4 had already been established by EPA.
In June 2016 (effective September 3016), EPA made the following Round 2 designations for Missouri. The area around Sikeston Power Station was classified as unclassifiable/attainment
and the areas around Kansas City Power and Light Sibley Generating Station in Jackson County and the Ameren Missouri Labadie Energy Center in Franklin County were both designated as
unclassifiable (additional information is needed before non-attainment or attainment designation can be made).
Five sources/areas in Illinois were designated by EPA as part of Round 2. A small area in Wood River Township in Madison County surrounding the Alton Steel facility was designated as
non-attainment. EPA also designated as non-attainment the area in Williamson County around the Marion Power Station, owned by the Southern Illinois Power Cooperative. Three
other areas/sources were designated as unclassifiable/attainment.
EPA's 2015 Data Requirements Rule sets out the criteria for the Round 3 and Round 4 designations and covers sources that emitted greater than 2,000 tons of SO2 in 2014 (latest emission year). Sixteen sources throughout Missouri are affected. A source can either install monitors or conduct modeling to demonstrate attainment with the standard. Some facilities could opt for federally enforceable limits of less than 2,000 tons which would remove emissions characterization obligation for a source. For Round 3, seven sources are using air quality modeling, with recent actual emissions, to demonstrate compliance with the standard. After action by the Missouri Air Conservation Commission, MoDNR will submit the Round 3 recommendations to EPA Region 7 in early January 2017. EPA will inform Missouri in the summer of their proposed designation decisions, allowing the state to provide additional information, if needed. EPA is to finalize Round 3 designations by December 31, 2017. For the four sources taking the monitoring option, EPA will make Round 4 designations by December 31, 2020. Five sources are going with federally enforceable emission limits.
Illinois EPA also has begun the next round of evaluation of additional areas based on the Data Requirements Rule. Round 3 boundary recommendations are due in January
2017. Modeling will be performed for most of these areas but there are some sources near Decatur which will be doing monitoring (Round 4).
Nitrogen Dioxide (NO2) Primary Standard
In January 2010, USEPA set a new one-hour standard of 100 ppb for NO2. As part of the implementation of this standard, USEPA set out new air monitoring and reporting requirements. In urban
areas, NO2 monitors are to be installed near major roads (within 164 feet) as well as other sites at which peak maximum concentrations are expected to occur. The monitoring network is to
begin operating by January 1, 2013. Based on the population of the St. Louis (MO-IL) region, two near-roadway monitors are required. MoDNR is conducing site evaluation and site selection
in conjunction with USEPA. The first near-roadway monitor is adjacent to I-64/US 40 in Forest Park in the City of St. Louis and began operation in January 2013. Carbon monoxide and PM2.5
data is also collected at this site. the second near roadway site was operational in early 2015. It is located at I-70 and Rider Trail, west of the I-70 and I-270 exchange.
Based on 2008-2012 monitor data, in 2012, USEPA determined that no area in the US is violating the 2010 NO2 standard. As sufficient air quality data is received from the new NO2 monitor
network, USEPA will revisit the designation of areas as in attainment of the standard, in non-attainment or unclassifiable (additional data needed).