Ozone planning information for industry
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Colorado’s ozone nonattainment area planning
In 2008, the US Environmental Protection Agency came out with a more strict ozone standard and the Denver Metro/North Front Range was designated as a “Marginal” nonattainment area for this standard in 2012. In 2016, this area was reclassified to a “Moderate” nonattainment area for the same standard. This means that although Colorado’s air quality is getting better, it is not improving quickly enough to meet EPA’s standard.
Colorado must meet the 2008 ozone standard by 2018 (based on data from the 2015-2017 3-year average). Based on current data, the Denver Metro/North Front Range might not meet the 2008 standard by the 2018 deadline, which could result in the nonattainment area being reclassified to “Serious” by 2019. This would cause major source permitting thresholds for facilities emitting VOC and NOx to drop to 50 tons per year. Currently, there are many factors that are affecting this classification, but we are working with stakeholders and EPA to determine the best path forward and prepare for this potential change. The attainment deadline could be extended by one year if Colorado meets the standard for 2017.
The Regional Air Quality Council is looking at control strategy options for the Denver Metro/North Front Range Ozone nonattainment area, such as a fuel strategy, lower VOC consumer products, and voluntary incentives for emissions reductions. The Air Pollution Control Division is engaged in stakeholder processes to determine RACT for the oil and gas sector and major sources of NOx and VOC emissions.
On July 20, 2017 the division will propose rule revisions to Colorado’s Regulation Number 7 in response to EPA’s Oil and Gas Control Technique Guidelines (CTG).
- July 20, 2017 meeting documents.
- EPA’s Control Techniques Guidelines for the Oil and Natural Gas Industry.
- Comments may be submitted to firstname.lastname@example.org.
- Comments received by the division can be viewed here: Oil and Gas CTG Comments.
2017 Stakeholder Meetings:
Additional public meetings are pending.
State and federal oil and gas rules related to ozone
- Regulation Number 7.
- EPA Oil and Natural Gas Sector: Emission Standards for New, Reconstructed, and Modified Sources (NSPS OOOOa).
- BLM Waste Prevention, Production Subject to Royalties, and Resource Conservation rule.
- NSPS OOOO.
More information for industry stakeholders
- Ongoing stakeholder processes.
- Major source RACT.
- Colorado air emissions requirements for the oil and gas industry.
- Ozone nonattainment area implications for businesses.
- Ozone exceedance data (April 30, 2017).
- Ozone nonattainment area map.
- History of Colorado's ozone reduction planning efforts.