ML092150501
| ML092150501 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 01/01/2008 |
| From: | State of IA, Dept of Natural Resources |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML092150501 (39) | |
Text
Iowa Ambient Air Monitoring Annual Report: 2008 Air Quality Bureau Iowa Department of Natural Resources Table of Contents 1
Table of Contents Iowa Ambient Monitoring Network Review: 2008 ................................................................................................................. 3 Introduction ........................................................................................................................................................................ 3 2008 Exceedances of National Ambient Air Quality Standards (NAAQS) in Iowa .............................................................. 4 NAAQS Exceedance Locations in Iowa Measured in 2008.................................................................................................. 5 PM2.5 NAAQS Exceedances in Iowa Measured in 2008 ....................................................................................................... 6 2008 Ambient Monitoring Network Changes ..................................................................................................................... 7 Iowa Ambient Monitoring Network ........................................................................................................................................ 8 2008 Monitoring Site Locations .......................................................................................................................................... 9 Monitoring Locations in Cedar Rapids .............................................................................................................................. 10 Monitoring Locations in Davenport .................................................................................................................................. 11 Monitoring Location in Des Moines/Clive ........................................................................................................................ 12 Ozone Monitoring Sites ........................................................................................................................................................ 13 Ozone Monitor Locations.................................................................................................................................................. 14 Comparison of 2008 Ozone Data with National Ambient Air Quality Standards ............................................................. 15 2008 Data Completeness - Ozone .................................................................................................................................... 16 PM2.5 Monitoring Sites .......................................................................................................................................................... 17 PM2.5 Monitor Locations ................................................................................................................................................... 18 Comparison of 2008 PM2.5 Data with National Ambient Air Quality Standards ............................................................... 19 2008 Data Completeness - PM2.5...................................................................................................................................... 20 PM10 Monitoring Sites ........................................................................................................................................................... 21 PM10 Monitor Locations .................................................................................................................................................... 22 Comparison of 2008 PM10 Data with the National Ambient Air Quality Standard ........................................................... 23 2008 Data Completeness - PM10 ...................................................................................................................................... 24 Sulfur Dioxide Monitoring Sites ............................................................................................................................................ 25 Sulfur Dioxide Monitor Locations ..................................................................................................................................... 26 Comparison of 2008 Sulfur Dioxide Data with National Ambient Air Quality Standards ................................................. 27 2008 Data Completeness - Sulfur Dioxide ........................................................................................................................ 28 Carbon Monoxide Monitoring Sites ...................................................................................................................................... 29 Carbon Monoxide Monitor Locations ............................................................................................................................... 30 Comparison of 2008 Carbon Monoxide Data with National Ambient Air Quality Standards ........................................... 31 2008 Data Completene - Carbon Monoxide .................................................................................................................... 32 Nitrogen Dioxide Monitoring Sites ....................................................................................................................................... 33 Nitrogen Dioxide Monitor Locations................................................................................................................................. 34 Comparison of 2008 Nitrogen Dioxide Data with the National Ambient Air Quality Standard........................................ 35 2008 Data Completeness - Nitrogen Dioxide ................................................................................................................... 36 Appendix A ............................................................................................................................................................................ 37 Ozone ................................................................................................................................................................................ 37 PM2.5 .................................................................................................................................................................................. 37 PM10 .................................................................................................................................................................................. 38 Carbon Monoxide ............................................................................................................................................................. 39 Nitrogen Dioxide ............................................................................................................................................................... 39 Table of Contents 2
Iowa Ambient Air Monitoring Annual Network Report: 2008 Iowa Department of Natural Resources - Air Quality Bureau - Air Monitoring Group Introduction The purpose of this review is to compare ambient air monitoring data gathered in the state of Iowa during 2008 with the National Ambient Air Quality Standards (NAAQS) established by the Environmental Protection Agency (EPA). The EPA has established NAAQS for seven criteria pollutants: particulate matter with a diameter less than 10 microns (PM10),
particulate matter with a diameter less than 2.5 microns (PM2.5), sulfur dioxide, ozone, nitrogen dioxide, carbon monoxide, and lead. Continuous monitoring methods have been approved by EPA for all criteria pollutants except lead.
Filter samplers and laboratory filter weighing procedures have been approved by EPA for both PM2.5 and PM10. All data (with the exception of carbon monoxide) summarized in this review was obtained using methods approved by EPA for comparison with the NAAQS. Carbon monoxide is monitored in Iowa with trace-level instruments that have not been approved by the EPA as a Federal Reference or Federal Equivalent Method, but have been recommended for use in quantifying low levels of carbon monoxide typical of most urban areas.
This report is divided into two parts. The first part is an executive summary, indicating where exceedances of the NAAQS were measured in Iowa during 2008. A more comprehensive review, which includes the location and summary data for each monitor in the network, is included in the second part.
Gaseous pollutant monitors (ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide) provide hourly values and operate 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> a day, seven days a week. Ozone monitors are operated only when ozone levels are highest, from April through October. Particulate filter samplers run for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at a time and collect one filter per day. Most PM10 and PM2.5 filter based monitors are operated at a sampling frequency of one sample every third day. Some particulate monitoring sites are run at frequencies greater than this nominal frequency if they are located in highly populated areas, near pollution sources, or if pollutant levels are close to health standards. Lead was not monitored in Iowa in 2008.
Incomplete data may skew the summary statistics for a monitor. In order to alert the reader to data completeness problems, monitors that were added or removed part way through the year have been indicated by an asterisk, and data completeness statistics have been provided for each monitor. If a monitor collected all of the scheduled samples, then it has an associated data completeness of 100%. If the data capture from a monitor is insufficient to compute a valid annual average according to EPA completeness criteria, then the bar representing the comparison of the annual average to the NAAQS for that specific monitor is shaded to be lighter than the rest of the bars on the corresponding chart. In 2008 there were 25 NAAQS exceedances in the state of Iowa. All of the exceedances were associated with the PM2.5 standard and are detailed in this report.
Data used to create this report were gathered by three organizations under contract with the Iowa Department of Natural Resources: the University of Iowa Hygienic Laboratory, the Linn County Public Health Department, and the Polk County Public Works Air Quality Division. Contract funds were provided by US EPA, the state of Iowa legislature, and regulated industry. Air pollution data for Iowa and all other states are available online at: http://www.epa.gov/air/data/.
Additional information on the NAAQS is available at: http://www.epa.gov/air/criteria.html.
Table of Contents 3
2008 Exceedances of National Ambient Air Quality Standards (NAAQS) in Iowa Pollutant Averaging Period Exceedance Level Units Number of Exceedances Ozone 8hr 0.076* ppm 0 PM 2.5 24hr 35.5 micrograms per cubic meter 25 annual 15.05 micrograms per cubic meter 0 PM10 24hr 155 micrograms per cubic meter 0 Sulfur dioxide 3hr 0.55 ppm 0 24hr 0.145 ppm 0 annual 0.0305 ppm 0 Carbon monoxide 1hr 35.5 ppm 0 8hr 9.5 ppm 0 Nitrogen dioxide annual 0.0535 ppm 0 Lead quarterly 1.55** micrograms per cubic meter N/A***
- The NAAQS for Ozone was lowered from 0.085 parts per million to 0.076 parts per million in May of 2008
- The NAAQS for Lead was lowered from 1.5 to 0.15 micrograms per cubic meter, effective 10/18/2008
- Lead was not monitored in 2008 Table of Contents 4
NAAQS Exceedance Locations in Iowa Measured in 2008 PM2.5 Table of Contents 5
PM2.5 NAAQS Exceedances in Iowa Measured in 2008 Sampling Frequency Daily Daily Daily Daily 1 in 3 Daily Daily 1 in 3 1 in 3 Daily Blackhawk Foundry Garfield Elementary Hoover Elementary Linn Public Health Jefferson Elementary Lowell Elementary Backbone State Park Monitoring Site Grout Museum Chancy Park Rainbow Park Exceedance Concentration (micrograms per cubic meter)
Date Count 1/27 36.3 1 2/3 37.5 37.6 36.8 3 2/23 46.2 48.4 43.2 41.7 43.5 50.3 50.5 7 2/24 35.5 38.5 37.8 36.3 41.2 49.3 43 7 3/11 45.8 1 4/23 35.6 1 7/4 62.3 1 9/26 36.8 1 10/22 50.7 1 10/23 45 1 12/18 35.6 1 Count 4 5 2 2 2 2 4 1 1 2 Total= 25 Table of Contents 6
2008 Ambient Monitoring Network Changes Sites Removed at the End of 2007 Site Name City County Site Label Start Date End Date Pollutants 191130029 Science Station Cedar Rapids Linn Cedar Rapids, Science Station - 12/31/2007 SO2 191390016 Greenwood Cemetary Muscatine Muscatine Muscatine, Greenwood Cemetary - 12/31/2007 SO2 191390017 Muscatine Power & Water Muscatine Muscatine Muscatine, Power and Water - 12/31/2007 SO2 191530059 National By-Products Des Moines Polk Des Moines, Nat. By-Products - 12/23/2007 PM2.5 Monitors Removed During 2008 Site Name City County Site Label Start Date End Date Pollutants 191130038 Ely Rd. SW Linn Cedar Rapids Cedar Rapids, Ely Rd. SW* - 3/31/2008 SO2 191130038 Ely Rd. SW Linn Cedar Rapids Cedar Rapids, Ely Rd. SW* - 3/31/2008 CO Monitors Added During 2008 Site Name City County Site Label Start Date End Date Pollutants 191130040 Public Health Cedar Rapids Linn Cedar Rapids, Public Health 1/15/2008 - PM2.5 191130040 Public Health Cedar Rapids Linn Cedar Rapids, Public Health 4/11/2008 - SO2 191130040 Public Health Cedar Rapids Linn Cedar Rapids, Public Health 4/11/2008 - CO 191032001 Hoover Elementary Iowa City Johnson Iowa City, Hoover Sch. 1/1/2008 - PM10 Table of Contents 7
Iowa Ambient Monitoring Network Site ID Name City Address County Site Label Pollutants 190130008 Grout Museum Waterloo West Park St. & South St. Black Hawk Waterloo, Grout Museum PM10, PM2.5 190170011 Waverly Airport Waverly Waverly Airport Bremer Waverly, Airport Ozone 190330018 Holnam Cement Mason City 17th St. & Washington St. Cerro Gordo Mason City, Holnam Cement PM10, SO2 190330020 Washington Sch. Mason City 700 N. Washington Avenue Cerro Gordo Mason City, Washington Sch. PM10 190450019 Chancy Park Clinton 23rd & Camanche Clinton Clinton, Chancy Park PM2.5, SO2 190450021 Rainbow Park Clinton Roosevelt St. Clinton Clinton, Rainbow Park Ozone, PM2.5 190550001 Backbone State Park not in a city Fish Hatchery Backbone State Park Delaware Backbone State Park PM2.5 190851101 Highway Maintenance Shed Pisgah 1575 Hwy 183 Harrison Pisgah, Highway Maintenance Ozone 191032001 Hoover Elementary Iowa City 2200 East Court Johnson Iowa City, Hoover Sch. PM10, PM2.5 191110008 Fire Station Keokuk 111S. 13th St. Lee Keokuk, Fire Station PM2.5 191130028 Kirkwood College Cedar Rapids 6301 Kirkwood Blvd SW (Iowa Hall) Linn Cedar Rapids, Kirkwood Coll. Ozone 191130031 Scottish Rite Temple Cedar Rapids 616 A Ave. Linn Cedar Rapids, Scottish Rite Temple SO2 191130033 Coggon Elementary School Coggon 408 E Linn St. Linn Coggon, Coggon Elementary School Ozone 191130037 Army Reserve Center Cedar Rapids 1599 Wenig Rd. NE Linn Cedar Rapids, Army Reserve PM10, PM2.5 191130038 Ely Rd. SW Cedar Rapids Ely Rd. SW Linn Cedar Rapids, Ely Rd. SW CO, SO2 191130040 Public Health Cedar Rapids 500 11th St. NW Linn Cedar Rapids, Public Health CO, PM2.5, SO2 191370002 Viking Lake State Park not in a city 2780 Viking Lake Road Montgomery Viking Lake State Park Ozone, PM10, PM2.5 191390015 Garfield School Muscatine 1409 Wisconsin Muscatine Muscatine, Garfield Sch. PM10, PM2.5 191390020 Musser Park Muscatine Oregon St. & Earl Ave. Muscatine Muscatine, Musser Park SO2 191471002 Iowa Lakes College Emmetsburg Iowa Lakes Community College - S Camp Palo Alto Emmetsburg, Iowa Lakes Coll. Ozone, PM10, PM2.5 191530030 Public Health Bldg. Des Moines 1907 Carpenter Polk Des Moines, Public Health Bldg. CO, NO2, Ozone, PM10, PM2.5, SO2 191532510 Indian Hills Junior High Clive 9401 Indian Hills Polk Clive, Indian Hills Sch. PM10, PM2.5 191550009 Franklin Elementary Council Bluffs 3130 C Ave. Pottawattamie Council Bluffs, Franklin Sch. PM10, PM2.5 191630014 Scott County Park Davenport Scott County Park Scott Scott County Park Ozone 191630015 Jefferson Elementary Davenport 10th St. & Vine St. Scott Davenport, Jefferson Sch. CO, NO2, Ozone, PM10, PM2.5, SO2 191630017 Linwood Mining Buffalo 11100 110th Ave. Scott Buffalo, LW Mining PM10 191630018 Adams Elementary Davenport 3029 N Division St. Scott Davenport, Adams Sch. PM10, PM2.5 191630019 Black Hawk Foundry Davenport 300 Wellman St. Scott Davenport, BH Foundry PM10, PM2.5 191690011 Slater Elementary Slater 505 Linn St. Story Slater, Slater Sch. Ozone 191770006 Lake Sugema not in a city 24430 Lacey Trl, Keosauqua Lake Sugema Van Buren Keosauqua, Lake Sugema Ozone, PM10, PM2.5, SO2 191810022 Lake Ahquabi State Park not in a city 1650 118th Ave. Warren Lake Ahquabi State Park Ozone 191930017 Lowell Elementary Sioux City 27th at Morgan Woodbury Sioux City, Lowell Sch. PM10, PM2.5 191970004 Jannsen Farm Clarion Jannsen Farm Wright Clarion, Jannsen Farm PM2.5 Table of Contents 8
2008 Monitoring Site Locations Table of Contents 9
Monitoring Locations in Cedar Rapids Table of Contents 10
Monitoring Locations in Davenport Table of Contents 11
Monitoring Locations in Des Moines/Clive Table of Contents 12
Ozone Monitoring Sites Site Name City County Site Label 190170011 Waverly Airport Waverly Bremer Waverly, Airport 190450021 Rainbow Park Clinton Clinton Clinton, Rainbow Park 190851101 Highway Maintenance Shed Pisgah Harrison Pisgah, Highway Maintenance 191130028 Kirkwood College Cedar Rapids Linn Cedar Rapids, Kirkwood Coll.
191130033 Coggon Elementary School Coggon Linn Coggon, Coggon Elementary School 191370002 Viking Lake State Park not in a city Montgomery Viking Lake State Park 191471002 Iowa Lakes College Emmetsburg Palo Alto Emmetsburg, Iowa Lakes Coll.
191530030 Public Health Bldg. Des Moines Polk Des Moines, Public Health Bldg.
191630014 Scott County Park Davenport Scott Scott County Park 191630015 Jefferson Elementary Davenport Scott Davenport, Jefferson Sch.
191690011 Slater Elementary Slater Story Slater, Slater Sch.
191770006 Lake Sugema not in a city Van Buren Keosauqua, Lake Sugema 191810022 Lake Ahquabi State Park not in a city Warren Lake Ahquabi State Park Table of Contents 13
Ozone Monitor Locations Table of Contents 14
Comparison of 2008 Ozone Data with National Ambient Air Quality Standards Table of Contents About This Chat 15
2008 Data Completeness - Ozone Table of Contents About This Chart 16
PM2.5 Monitoring Sites Site Name City County Site Label 190130008 Grout Museum Waterloo Black Hawk Waterloo, Grout Museum 190450019 Chancy Park Clinton Clinton Clinton, Chancy Park 190450021 Rainbow Park Clinton Clinton Clinton, Rainbow Park 190550001 Backbone State Park not in a city Delaware Backbone State Park 191032001 Hoover Elementary Iowa City Johnson Iowa City, Hoover Sch.
191110008 Fire Station Keokuk Lee Keokuk, Fire Station 191130037 Army Reserve Center Cedar Rapids Linn Cedar Rapids, Army Reserve 191130040 Public Health Cedar Rapids Linn Cedar Rapids, Public Health 191370002 Viking Lake State Park not in a city Montgomery Viking Lake State Park 191390015 Garfield School Muscatine Muscatine Muscatine, Garfield Sch.
191471002 Iowa Lakes College Emmetsburg Palo Alto Emmetsburg, Iowa Lakes Coll.
191530030 Public Health Bldg. Des Moines Polk Des Moines, Public Health Bldg.
191532510 Indian Hills Junior High Clive Polk Clive, Indian Hills Sch.
191550009 Franklin Elementary Council Bluffs Pottawattamie Council Bluffs, Franklin Sch.
191630015 Jefferson Elementary Davenport Scott Davenport, Jefferson Sch.
191630018 Adams Elementary Davenport Scott Davenport, Adams Sch.
191630019 Black Hawk Foundry Davenport Scott Davenport, BH Foundry 191770006 Lake Sugema not in a city Van Buren Keosauqua, Lake Sugema 191930017 Lowell Elementary Sioux City Woodbury Sioux City, Lowell Sch.
191970004 Jannsen Farm Clarion Wright Clarion, Jannsen Farm Table of Contents 17
PM2.5 Monitor Locations Table of Contents 18
Comparison of 2008 PM2.5 Data with National Ambient Air Quality Standards Table of Contents About This Chart 19
2008 Data Completeness - PM2.5 Table of Contents About This Chart 20
PM10 Monitoring Sites Site Name City County Site Label 190130008 Grout Museum Waterloo Black Hawk Waterloo, Grout Museum 190330018 Holnam Cement Mason City Cerro Gordo Mason City, Holnam Cement 190330020 Washington Sch. Mason City Cerro Gordo Mason City, Washington Sch.
191032001 Hoover Elementary Iowa City Johnson Iowa City, Hoover Sch.
191130037 Army Reserve Center Cedar Rapids Linn Cedar Rapids, Army Reserve 191370002 Viking Lake State Park not in a city Montgomery Viking Lake State Park 191390015 Garfield School Muscatine Muscatine Muscatine, Garfield Sch.
191471002 Iowa Lakes College Emmetsburg Palo Alto Emmetsburg, Iowa Lakes Coll.
191530030 Public Health Bldg. Des Moines Polk Des Moines, Public Health Bldg.
191532510 Indian Hills Junior High Clive Polk Clive, Indian Hills Sch.
191550009 Franklin Elementary Council Bluffs Pottawattamie Council Bluffs, Franklin Sch.
191630015 Jefferson Elementary Davenport Scott Davenport, Jefferson Sch.
191630017 Linwood Mining Buffalo Scott Buffalo, LW Mining 191630018 Adams Elementary Davenport Scott Davenport, Adams Sch.
191630019 Black Hawk Foundry Davenport Scott Davenport, BH Foundry 191770006 Lake Sugema not in a city Van Buren Keosauqua, Lake Sugema 191930017 Lowell Elementary Sioux City Woodbury Sioux City, Lowell Sch.
Table of Contents 21
PM10 Monitor Locations Table of Contents 22
Comparison of 2008 PM10 Data with the National Ambient Air Quality Standard Table of Contents About This Chart 23
2008 Data Completeness - PM10 Table of Contents About This Chart 24
Sulfur Dioxide Monitoring Sites Site Name City County Site Label 190330018 Holnam Cement Mason City Cerro Gordo Mason City, Holnam Cement 190450019 Chancy Park Clinton Clinton Clinton, Chancy Park 191130031 Scottish Rite Temple Cedar Rapids Linn Cedar Rapids, Scottish Rite Temple 191130038 Ely Rd. SW Cedar Rapids Linn Cedar Rapids, Ely Rd. SW 191130040 Public Health Cedar Rapids Linn Cedar Rapids, Public Health 191390020 Musser Park Muscatine Muscatine Muscatine, Musser Park 191530030 Public Health Bldg. Des Moines Polk Des Moines, Public Health Bldg.
191630015 Jefferson Elementary Davenport Scott Davenport, Jefferson Sch.
191770006 Lake Sugema not in a city Van Buren Keosauqua, Lake Sugema Table of Contents 25
Sulfur Dioxide Monitor Locations Table of Contents 26
Comparison of 2008 Sulfur Dioxide Data with National Ambient Air Quality Standards Table of Contents About This Chart 27
2008 Data Completeness - Sulfur Dioxide Table of Contents About This Chart 28
Carbon Monoxide Monitoring Sites Site Name City County Site Label 191130038 Ely Rd. SW Cedar Rapids Linn Cedar Rapids, Ely Rd. SW 191130040 Public Health Cedar Rapids Linn Cedar Rapids, Public Health 191530030 Public Health Bldg. Des Moines Polk Des Moines, Public Health Bldg.
191630015 Jefferson Elementary Davenport Scott Davenport, Jefferson Sch.
Table of Contents 29
Carbon Monoxide Monitor Locations Table of Contents 30
Comparison of 2008 Carbon Monoxide Data with National Ambient Air Quality Standards Table of Contents About This Chart 31
2008 Data Completeness - Carbon Monoxide Table of Contents About This Chart 32
Nitrogen Dioxide Monitoring Sites Site Name City County Site Label 191530030 Public Health Bldg. Des Moines Polk Des Moines, Public Health Bldg.
191630015 Jefferson Elementary Davenport Scott Davenport, Jefferson Sch.
Table of Contents 33
Nitrogen Dioxide Monitor Locations Table of Contents 34
Comparison of 2008 Nitrogen Dioxide Data with the National Ambient Air Quality Standard Table of Contents About This Chart 35
2008 Data Completeness - Nitrogen Dioxide Table of Contents About This Chart 36
Appendix A Additional Chart Information Listed below is additional information that may be useful in interpreting the charts contained in this review Ozone Comparison of 2008 Ozone Data with National Ambient Air Quality Standards This chart shows the highest eight-hour ozone average (expressed as a percentage of the new 0.076 ppm and old 0.085 ppm eight-hour NAAQS) for each ozone monitor operated in 2008. The National Ambient Air Quality Standard for ozone was changed from 0.085 ppm to 0.076 ppm in May of 2008.
Back to Chart Data Completeness - Ozone This chart shows the total number of valid ozone monitoring days (based on 8-hour average, expressed as a percentage of the total number of days in the ozone season) for each ozone monitor operated in 2008.
According to EPA guidelines, an ozone monitoring day is considered valid if at least 75% of the hourly averages for the 8-hour period are available. In the event that less than 75% of the 8-hour averages are available, a day is also counted as valid if the daily maximum 8-hour average for that day is greater than the NAAQS (0.076 ppm). Ozone season runs from April through October; this amounts to 214 possible sampling days. An ozone monitor that recorded data for all 214 days of the season would have a data capture rate of 100%.
Back to Chart PM2.5 Comparison of 2008 PM2.5 Data with National Ambient Air Quality Standards This chart shows the highest 24-hour value (expressed as a percentage of the 35.5 µg/m 3 24-hour NAAQS),
and the annual average (expressed as a percentage of the 15.05 µg/m 3 annual NAAQS) for each PM2.5 monitor operated in 2008.
Back to Chart Data Completeness - PM2.5 This chart shows the fraction of scheduled sampling days for each PM2.5 monitor operated in 2008, where a PM2.5 sample was actually collected. During 2008, PM2.5 samplers in Iowa were scheduled to operate at a sampling frequency of either one sample every third day (122 scheduled samples) or one sample every day (366 scheduled samples). The sampling frequency of each monitor is indicated by the color of the bar.
Back to Chart Table of Contents 37
PM10 Comparison of 2008 PM10 Data with National Ambient Air Quality Standards This chart shows the highest 24-hour value (expressed as a percentage of the 155 µg/m3 24-hour NAAQS) for each PM10 monitor operated in 2008.
Back to Chart Data Completeness - PM10 This chart shows the fraction of scheduled sampling days in 2008, for each PM10 monitor operated in 2008, where a PM10 sample was actually collected. During 2008, PM10 samplers in Iowa were scheduled to operate at a frequency of one sample every third day (122 scheduled samples), one sample every other day (183 scheduled samples), or one sample every day (366 scheduled samples). The sampling frequency of each monitor is indicated by the color of the bar in the chart.
Back to Chart Sulfur Dioxide Comparison of 2008 Sulfur Dioxide Data with National Ambient Air Quality Standards This chart shows the highest 3-hour value (expressed as a percentage of the 0.55 ppm 3-hour NAAQS), the highest 24-hour value (expressed as a percentage of the 0.145 ppm 24-hour NAAQS), and the annual average (expressed as a percentage of the 0.0305 ppm annual NAAQS) for each sulfur dioxide monitor operated in Iowa in 2008.
Back to Chart Data Completeness - Sulfur Dioxide This chart shows the total number of hourly sulfur dioxide values (expressed as a percentage of the total number of hours in 2008) for each sulfur dioxide monitor that operated in 2008. A sulfur dioxide monitor that recorded data for all 8784 hours0.102 days <br />2.44 hours <br />0.0145 weeks <br />0.00334 months <br /> during 2008 would have a data capture rate of 100%.
Back to Chart Table of Contents 38
Carbon Monoxide Comparison of 2008 Carbon Monoxide Data with National Ambient Air Quality Standards This chart shows the highest 1-hour value (expressed as a percentage of the 35.5 ppm 1-hour NAAQS) and the highest 8-hour value (expressed as a percentage of the 9.5 ppm 8-hour NAAQS) for each carbon monoxide monitor operated in 2008.
Back to Chart Data Completeness - Carbon Monoxide This chart shows the total number of hourly carbon monoxide values (expressed as a percentage of the total number of hours in 2008). A carbon monoxide monitor that recorded data for all 8784 hours0.102 days <br />2.44 hours <br />0.0145 weeks <br />0.00334 months <br /> during 2008 would have a data capture rate of 100%.
Back to Chart Nitrogen Dioxide Comparison of 2008 Nitrogen Dioxide Data with National Ambient Air Quality Standards This chart shows the annual average (expressed as a percentage of the 0.0535 ppm annual NAAQS) for each nitrogen dioxide monitoring site that operated in 2008.
Back to Chart Data Completeness - Nitrogen Dioxide This chart shows the total number of hourly nitrogen dioxide values (expressed as a percentage of the total number of hours in 2008). A nitrogen dioxide monitor that recorded data for all 8784 hours0.102 days <br />2.44 hours <br />0.0145 weeks <br />0.00334 months <br /> during 2008 would have a data capture rate of 100%.
Back to Chart Table of Contents 39