Air Quality

California Proclaims State Of Emergency And Mobilises Hazmat Response After Garden Grove Chemical Incident

In late May 2026, California declared a state of emergency in Orange County and mobilised more than 785 specialised responders after a major hazardous chemical incident at an aerospace facility in Garden Grove. The scale of the evacuation, intensive air and water monitoring, and targeted methyl methacrylate exposure guidance underscores the need for strong chemical storage controls, emergency planning and public health communication for industrial sites in populated areas.

25 May 2026, 10:01gov.ca.govUnited States

US EPA Seeks Comment on Renewal of Information Collection for PVC and Copolymer NESHAP

In May 2026, the US EPA asked OMB to renew its information collection requirements for the NESHAP covering polyvinyl chloride and copolymer production, opening a 30-day public comment period that runs until 22 June 2026. For PVC production facilities this does not change emission limits, but it will lock in existing reporting and recordkeeping burdens for another cycle, making this a key opportunity to comment on workload and cost assumptions before the renewal is finalised.

24 May 2026, 21:33federalregister.govUnited States

Montana DEQ Seeks Comment On Draft 2026 Air Monitoring Network Plan

Montana's Department of Environmental Quality has opened a public consultation on its draft 2026 Annual Air Monitoring Network Plan, with comments due by 21 June 2026. While the notice does not immediately change regulatory obligations, it shapes how the state's ambient air monitoring network will be configured in 2026, so Montana air-emitting facilities and local stakeholders may wish to review and comment.

24 May 2026, 21:30content.govdelivery.comUnited States

Texas Commission On Environmental Quality Agreed And Enforcement Orders; Opportunity To Comment (Comments Due 23 June 2026)

Texas environmental regulator TCEQ has published a Texas Register notice listing 40 proposed Agreed Orders and multiple adopted enforcement orders for industrial, energy and water sector facilities, with written comments on the proposed administrative orders due by 23 June 2026. For named operators, including major chemical and refinery sites, this consolidates penalties and corrective obligations and provides a short window to scrutinise orders, engage with TCEQ where appropriate, and recalibrate Texas environmental compliance and enforcement‑risk planning.

24 May 2026, 21:28sos.state.tx.usUnited States

California Air Resources Board Webinar on Draft 2023 Consumer Products Survey Data

California Air Resources Board will hold a 2 June 2026 webinar to present draft 2023 consumer and commercial product survey data, explain how the dataset will support its consumer products air quality programme, and invite stakeholder feedback. This offers manufacturers and importers an opportunity to validate how their product categories are represented in the data before CARB uses it for inventories, risk assessments, and future rulemakings.

24 May 2026, 21:22content.govdelivery.comUnited States

Delaware House Passes HB 402 To Extend Title V Operating Permit Fees Through 2029

Delaware's House has passed HB 402, a bill that would extend Clean Air Act Title V operating permit fees through 2029 and update the base, user, and programme fee structure for Title V sources from 2027 onward. If the bill is enacted, Title V facilities in Delaware will face continued fee obligations under an adjusted fee schedule and should factor the extended 2027–2029 horizon into budget, permitting, and compliance planning.

24 May 2026, 21:22legis.delaware.govUnited States

Oklahoma DEQ Opens Public Comment on 2026 Draft SO2 Annual Report

Oklahoma’s environmental regulator is inviting public comment on the draft 2026 SO2 air-quality report for four major sources under the 2010 primary SO2 NAAQS, with submissions due by 22 June 2026. Facilities and advisors should review the modeled emissions and inventory data now to confirm it accurately reflects operations and to flag any data or modeling issues before the report is finalised.

24 May 2026, 21:07oklahoma.govUnited States

Michigan House Refers HB 5557 on Emission Inventory Calculation to Second Reading

On 21 May 2026, the Michigan House advanced HB 5557 to second reading, proposing to amend state air pollution law so that emission inventory calculations use the longest averaging period allowed under the Clean Air Act. If enacted, this would standardise how emission profile data are calculated for Michigan facilities and could affect emissions reporting metrics and compliance planning for air-permitted operations in the state.

24 May 2026, 21:04legislature.mi.govUnited States

California Air Resources Board Corrects Comment Deadline for 2026 Air Monitoring Network Plan

On 21 May 2026, the California Air Resources Board released the draft 2026 Air Monitoring Network Plan for public comment and corrected the review deadline to 20 June 2026. Air monitoring and compliance teams should align planning with this updated comment window, as the final network configuration will shape how California tracks criteria air pollutants across 26 air districts.

23 May 2026, 20:06ww2.arb.ca.govUnited States

North Dakota DEQ Opens Comment on Title V Permit To Construct Revision for ONEOK Antelope Compressor Station

North Dakota’s Department of Environmental Quality has opened public comment on a revised Title V Permit to Construct for ONEOK Rockies Midstream’s Antelope Compressor Station, with the comment window running from 28 May to 26 June 2026 and EPA review to follow. The draft permit sets specific NOx, CO and VOC emission limits, control technologies and monitoring obligations under federal NSPS/NESHAP standards and state air rules, so midstream operators should review the conditions now to ensure current and planned equipment can comply.

23 May 2026, 19:58deq.nd.govUnited States

England: Environment Agency Issues Variation V012 to Saltend Power Station Environmental Permit EPR/QP3539LE

In May 2026 the Environment Agency issued a variation and consolidated permit for Saltend Power Station in Hull, adding a new gas‑fired boiler, revising NOx and cooling‑water conditions, and updating reporting under the Industrial Emissions Directive. The decision tightens monitoring and formalises operating caps and commissioning requirements that energy and chemicals operators must factor into steam and power supply planning, environmental compliance, and longer‑term investment decisions.

23 May 2026, 19:20assets.publishing.service.gov.ukUnited Kingdom

California CARB Opens Public Review on Draft 2026 Air Monitoring Network Plan

California’s air regulator has released the draft 2026 Annual Network Plan for ambient monitoring of criteria air pollutants across 26 of the state’s 35 air districts, opening a 30-day public review period that ends on 19 June 2026. This consultation shapes how California’s regulatory air monitoring network will operate and feed into federal reporting, so stakeholders affected by air quality planning in the state should review the draft and consider submitting comments by the deadline.

23 May 2026, 11:20ww2.arb.ca.govUnited States

Friuli Venezia Giulia Council Approves Environmental Amendments to Draft Law 79

Friuli Venezia Giulia has approved environmental amendments to Draft Law 79 that simplify EcoEventi funding, launch deplastification grants for catering microenterprises, extend the Bando stufe clean heating incentives, and support a regional renewable energy community. These measures strengthen local financial support for waste reduction, domestic air quality and community renewables, signalling that regional authorities expect households, small businesses and municipalities to accelerate investments in cleaner equipment and more sustainable event practices.

23 May 2026, 11:19regione.fvg.itItaly

US EPA Approves Arizona Gila County RACT SIP for 2015 Ozone NAAQS

In May 2026, the US EPA approved Arizona’s 2025 state implementation plan revision demonstrating reasonably available control technology for ozone precursors in the Gila County portion of the Phoenix–Mesa nonattainment area, with the rule taking effect on 22 June 2026. This makes ADEQ’s RACT analysis and extensive negative declarations for VOC and NOx source categories federally enforceable, giving operators greater certainty on current control expectations while shaping how future sources and permits will be evaluated under the Clean Air Act.

23 May 2026, 11:16federalregister.govUnited States

Netherlands Publishes Q1 2026 Overview of Implemented and Pending EU Directives

The Dutch parliament has published a Q1 2026 overview of EU directive transposition, confirming implementation of the new lead and diisocyanate occupational exposure limit directive and highlighting numerous environment and climate files still pending in the Netherlands. This gives compliance teams clear visibility that Dutch law already reflects the stricter OELs, while signalling that major air, water, waste, energy-efficiency and asbestos measures remain open and should be factored into medium-term regulatory planning.

23 May 2026, 09:16zoek.officielebekendmakingen.nlNetherlands

EU Parliament Adopts Negotiating Position On Roadworthiness Tests And Roadside Inspections

In May 2026 the European Parliament adopted its negotiating position on the EU roadworthiness package and authorised talks with the Council on revised rules for periodic vehicle checks and roadside inspections. The mandate keeps existing inspection intervals but signals tighter controls on odometer fraud, advanced safety systems and exhaust emissions, so vehicle makers, garages and fleet operators should anticipate more demanding future inspection and data-sharing obligations even though no new legal duties apply yet.

23 May 2026, 09:11europarl.europa.euEuropean Union

Louisiana HB1153 Burn-Ban Authority Bill Advances to Senate Third Reading

Louisiana’s HB 1153 has cleared House approval and advanced to third reading in the Senate, proposing to let parishes and municipalities impose temporary burn bans with defined civil and criminal penalties. If enacted, companies and landowners using open burning for land‑clearing, waste disposal or recreational purposes in Louisiana would face tighter restrictions, higher enforcement risk and potential liability for suppression costs whenever local burn bans are declared.

22 May 2026, 19:01legis.la.govUnited States

Germany BGH Clarifies Diesel Software Update Impact on Difference Damage (VIa ZR 412/24)

Germany’s Federal Court of Justice has clarified when diesel software updates extinguish or reduce "difference damage" liability in defeat-device cases, in a May 2026 decision dismissing a non-admission complaint in VIa ZR 412/24. Manufacturers can no longer treat KBA-approved updates as a safe harbour; they must be able to demonstrate that each update removes all unlawful defeat devices and materially dispels the risk of operating bans, or expect continued litigation exposure and damages claims.

22 May 2026, 18:56rechtsprechung-im-internet.deGermany

Texas Commission on Environmental Quality Opens NTIG Grants for Stationary Emissions Reduction Projects

In May 2026, the Texas Commission on Environmental Quality opened applications for its New Technology Implementation Grant Program, offering $16.5 million to co-fund emission-reduction projects at stationary sources across Texas. Industrial and oil and gas operators can secure up to 50% co-funding for qualifying projects, creating a time-limited opportunity to advance air-emissions controls and clean energy storage ahead of the 25 September 2026 application deadline.

22 May 2026, 18:54tceq.texas.govUnited States

US Senate Proposes EPA Tropospheric Ozone Research Program (S.4571)

In May 2026, a US Senate bill (S.4571) was introduced that would require the Environmental Protection Agency to establish a dedicated tropospheric ozone research program. If enacted, this could strengthen the scientific basis for future changes to US ground-level ozone standards and air-quality regulation, with potential implications for industrial and energy-sector emission controls over time.

22 May 2026, 18:53congress.govUnited States