Annual Percentage of Days with NO2 Levels Above the National Ambient Air Quality Standard (NAAQS) by County Metadata
- metadata
- idinfo
- citation
- citeinfo
- origin: New Mexico EPHTN Project Manager
- pubdate: 20240102
- title: Annual Percentage of Days with NO2 Levels Above the National Ambient Air Quality Standard (NAAQS) by County
- onlink
- descript
- abstract: The county-level daily NO2 dataset is created using data downloaded from the US Environmental Protection Agency (EPA) (https://aqs.epa.gov/aqsweb/airdata/download_files.html). These data were originally provided to EPA by the New Mexico Environment Department Air Quality Bureau, as required under the Clean Air Act. Data are only provided for counties with federal reference methods (FRM, method code 8801) to monitor NO2. Most NO2 monitors take samples every third day (some every sixth day) and a few measure every day; summing the total number of days for each county above the National Ambient Air Quality Standard (NAAQS) standard and dividing by the total number of days monitored effectively provides an estimate of the percentage of days above the NAAQS standard for a given year for each county with FRM monitoring. Effective April 12, 2010, the 1-hour NAAQS for NO2 is 100 parts per billion (ppb) based on the 3-year average 98th percentile of the yearly distribution of 1-hour daily maximum concentrations, and an annual standard at a level of 53 ppb. For counties without FRM monitors, missing values are designated as "No Monitor." The dataset contains for each county with complete monitoring data: year, county FIPS code, days monitored, days over NAAQS, and percent of days with NO2 above the NAAQS. The dataset was created using guidelines provided in the CDC NCDM Recommendations (version 4.0). The indicator documentation is available from CDC's Environmental Public Health Tracking Network.
- purpose: This dataset contains calculated measures for air quality for use on the NM public portal. The dataset is intended for use on the NM EPHT portal for displays describing NO2-related air quality across NM by county with NO2 FRM monitors. These data are not intended for performing health assessments or otherwise being directly related or linked to health data. The data for this indicator represent highly populated counties that have NO2 FRM monitors. As a result, the data tend to reflect urban air quality and longer-term average air quality levels. Populations in counties without monitors may also be exposed to concentrations that exceed the standard. These data will give an idea of what the yearly exceedance of daily NO2 is in an area. This indicator can be used to inform policy makers and the public about the degree of potential exposures to NO2 within New Mexico during a given year and over time (trends). The measure (annual percentage of days above the NO2 NAAQS) can be compared to health-based benchmarks to communicate the degree of public health concern to policy makers and the general public. The measure can be affected by monitor density, placement of monitors, and frequency of monitoring, and spatial and temporal coverage will vary within the state. However, this measure does not directly reflect exposure. Certain geographic areas, such as those near busy roads, are likely to have higher values of NO2 levels. It is also important to understand that the relationship between ambient concentrations and personal exposure is uncertain, and it varies depending upon pollutant, activity patterns, and locality or microenvironments. The percentage of state population living in counties with no NO2 measurements must always be considered when attempting to estimate the proportion of population at risk.
- timeperd
- timeinfo
- rngdates
- begdate: 19990101
- begtime
- enddate: 20221231
- endtime
- current: Publication Date
- status: The National Ambient Air Quality Standard (NAAQS) for NO2 is 53 ppb.
- progress: Complete
- update: Annually
- spdom
- bounding
- westbc: -109.05017700000001
- eastbc: -103.00206900000001
- northbc: 37.000292999999999
- southbc: 31.332173999999998
- keywords
- theme
- themekt: Exposure Type - CDC
- themekey: Air quality; Ambient air quality; Air; Nitrogen Dioxide; NO2; Environment
- place
- placekt: FIPS 5-2 (State)
- placekey: NM, New Mexico, 35
- accconst: None
- useconst: As a general indicator of air quality over space and time, this indicator is not intended for use in performing health assessments or otherwise being directly linked (related) with health data. Acknowledgement of the EPA would be appreciated.
- ptcontac
- cntinfo
- cntperp
- cntper: New Mexico EPHTN Project Manager
- cntorg: New Mexico Department of Health, Environmental Health Epidemiology Bureau
- cntpos
- cntaddr
- addrtype: Physical
- address: 1190 St. Francis Drive
- city: Santa Fe
- state: NM
- postal: 87505
- country: United States Of America
- cntvoice: 18337968773
- cntvoice
- cnttdd
- cntfax: 5058270013
- cntemail: DOH-EHEB@doh.nm.gov
- hours: 8:00 - 5:00
- cntinst
- secinfo
- secsys: None
- secclass: Unclassified
- sechandl: None
- native: SAS
- dataqual
- logic: None
- complete: The air quality data used in calculating the indicator and measure are tested for completeness to ensure annual monitoring such that there is sampling within the four (4) quarters for each area's year. If data for a county do not achieve this completeness test, then the NO2 estimate is not provided.
- lineage
- procstep
- procdesc: Calculate the indicator and measure.
- procdate: 20231222
- eainfo
- overview
- eaover: NM EPHT air quality county measure for NO2 for 1999 - 2022.
- eadetcit: CDC Environmental Public Health Tracking Network, NCDM Recommendations Version 4.0, Air Quality.
- distinfo
- distrib
- cntinfo
- cntperp
- cntper: New Mexico EPHTN Project Manager
- cntorg: New Mexico Department of Health, Environmental Health Epidemiology Bureau
- cntpos
- cntaddr
- addrtype: Physical
- address: 1190 St. Francis Drive
- city: Santa Fe
- state: NM
- postal: 87505
- country: United States Of America
- cntvoice: 18337968773
- cntvoice
- cnttdd
- cntfax: 5058270013
- cntemail: DOH-EHEB@doh.nm.gov
- hours: 8:00 - 5:00
- cntinst
- resdesc: Online Data
- distliab: Although these data have been processed successfully on a computer system at the New Mexico Department of Health (NMDOH), no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. NMDOH shall not be held liable for improper or incorrect use of the data described and/or contained herein.
- custom: None
- metainfo
- metd: 20240102
- metc
- cntinfo
- cntperp
- cntper: New Mexico EPHTN Project Manager
- cntorg: New Mexico Department of Health, Environmental Health Epidemiology Bureau
- cntpos
- cntaddr
- addrtype: Physical
- address: 1190 St. Francis Drive
- city: Santa Fe
- state: NM
- postal: 87505
- country: United States Of America
- cntvoice: 18337968773
- cntvoice
- cnttdd
- cntfax: 5058270013
- cntemail: DOH-EHEB@doh.nm.gov
- hours: 8:00 - 5:00
- cntinst
- metstdn: EPHTN Tracking Network Profile Version 3.2
- metac: None
- metuc: None
