NPR | Community groups in Louisiana have filed a federal lawsuit alleging a state law regulating community air monitoring violates their constitutional rights to free speech and petition. The law restricts the use of non-EPA-approved air sensors, limiting public data sharing and enforcement actions, which critics argue silences vital grassroots efforts in polluted areas like Cancer Alley.

Environmental Defense Fund | The U.S. House voted 216–212 to overturn a 2024 rule requiring major polluters to comply with strict air toxics standards, reinstating a Trump-era loophole that allows reclassified facilities to emit more pollution. Environmental advocates warn this rollback undermines decades of Clean Air Act protections and increases public exposure to highly toxic pollutants like arsenic, lead, and mercury.

NPR | Congress has voted to overturn a Clean Air Act rule that required industrial facilities to maintain strict pollution controls even after reducing emissions, marking the first rollback of the law’s protections. Critics warn the move will allow around 1,800 facilities to evade regulation, increasing community exposure to toxic pollutants linked to cancer, birth defects, and neurological damage.

citybuzz | IotaComm and TELLUS have announced a strategic partnership to combine IotaComm’s LoRaWAN® wireless infrastructure with TELLUS’ advanced air quality sensors and analytics. The collaboration aims to deliver real-time, hyperlocal environmental monitoring for sectors like education, manufacturing, and smart cities, enhancing public health, safety, and sustainability through integrated data insights.

Envirotech Online | Mega System Srl has introduced a fully OTM-45-compliant PFAS sampling line for stack emissions, offering high-precision monitoring through isokinetic sampling and advanced, contamination-free glassware. The system includes a heated probe, automatic isokinetic sampler, cooling unit, and a specialized glassware kit designed to ensure accurate PFAS quantification and minimize environmental and health risks.

The Salt Lake Tribune | Utah’s current air quality monitoring system is struggling to adequately track dust storms originating from the drying Great Salt Lake, raising health concerns due to toxic sediment exposure. State scientists and researchers emphasize the urgent need for expanded monitoring sites and funding to measure PM10 levels and provide timely public alerts, especially as lake levels continue to drop.

KKTV | The City of Manitou Springs will hold an outdoor Air Quality Awareness Week event on Wednesday, May 22, from 10:00 a.m. to 2:30 p.m. at Memorial Park. Residents are encouraged to walk or bike to school and attend the event to learn how to reduce their impact on air quality.

Canary Media | Air pollution from Midwest steel mills continues to harm local communities, with research suggesting cleaner-burning alternatives could improve conditions. Meanwhile, debates around fossil fuel plant replacements, clean energy investments, and electric grid modernization are intensifying across Indiana, Michigan, and Minnesota, reflecting broader tensions between clean energy goals and current economic or political pressures.

MPR News | A widespread rainfall across central and southern Minnesota delivered up to 4 inches in some areas, significantly easing drought and improving air quality, with some areas seeing record-low pollution levels. While the rain missed northern fire zones, the Memorial Day weekend forecast looks mostly sunny and dry with highs in the 60s, and long-range outlooks suggest a warmer-than-average summer.

Maricopa County | The Arizona Department of Environmental Quality has issued an Ozone High Pollution Advisory for Maricopa County on May 21, 2025, due to expected ozone levels exceeding federal health standards. Residents, especially children and those with respiratory conditions, are advised to limit outdoor activity and follow recommended actions like driving less and avoiding wood burning to help reduce harmful emissions.

NPR | Community groups in Louisiana have filed a federal lawsuit alleging a state law regulating community air monitoring violates their constitutional rights to free speech and petition. The law restricts the use of non-EPA-approved air sensors, limiting public data sharing and enforcement actions, which critics argue silences vital grassroots efforts in polluted areas like Cancer Alley.

Environmental Defense Fund | The U.S. House voted 216–212 to overturn a 2024 rule requiring major polluters to comply with strict air toxics standards, reinstating a Trump-era loophole that allows reclassified facilities to emit more pollution. Environmental advocates warn this rollback undermines decades of Clean Air Act protections and increases public exposure to highly toxic pollutants like arsenic, lead, and mercury.

NPR | Congress has voted to overturn a Clean Air Act rule that required industrial facilities to maintain strict pollution controls even after reducing emissions, marking the first rollback of the law’s protections. Critics warn the move will allow around 1,800 facilities to evade regulation, increasing community exposure to toxic pollutants linked to cancer, birth defects, and neurological damage.

citybuzz | IotaComm and TELLUS have announced a strategic partnership to combine IotaComm’s LoRaWAN® wireless infrastructure with TELLUS’ advanced air quality sensors and analytics. The collaboration aims to deliver real-time, hyperlocal environmental monitoring for sectors like education, manufacturing, and smart cities, enhancing public health, safety, and sustainability through integrated data insights.

Envirotech Online | Mega System Srl has introduced a fully OTM-45-compliant PFAS sampling line for stack emissions, offering high-precision monitoring through isokinetic sampling and advanced, contamination-free glassware. The system includes a heated probe, automatic isokinetic sampler, cooling unit, and a specialized glassware kit designed to ensure accurate PFAS quantification and minimize environmental and health risks.

The Salt Lake Tribune | Utah’s current air quality monitoring system is struggling to adequately track dust storms originating from the drying Great Salt Lake, raising health concerns due to toxic sediment exposure. State scientists and researchers emphasize the urgent need for expanded monitoring sites and funding to measure PM10 levels and provide timely public alerts, especially as lake levels continue to drop.

KKTV | The City of Manitou Springs will hold an outdoor Air Quality Awareness Week event on Wednesday, May 22, from 10:00 a.m. to 2:30 p.m. at Memorial Park. Residents are encouraged to walk or bike to school and attend the event to learn how to reduce their impact on air quality.

Canary Media | Air pollution from Midwest steel mills continues to harm local communities, with research suggesting cleaner-burning alternatives could improve conditions. Meanwhile, debates around fossil fuel plant replacements, clean energy investments, and electric grid modernization are intensifying across Indiana, Michigan, and Minnesota, reflecting broader tensions between clean energy goals and current economic or political pressures.

MPR News | A widespread rainfall across central and southern Minnesota delivered up to 4 inches in some areas, significantly easing drought and improving air quality, with some areas seeing record-low pollution levels. While the rain missed northern fire zones, the Memorial Day weekend forecast looks mostly sunny and dry with highs in the 60s, and long-range outlooks suggest a warmer-than-average summer.

Maricopa County | The Arizona Department of Environmental Quality has issued an Ozone High Pollution Advisory for Maricopa County on May 21, 2025, due to expected ozone levels exceeding federal health standards. Residents, especially children and those with respiratory conditions, are advised to limit outdoor activity and follow recommended actions like driving less and avoiding wood burning to help reduce harmful emissions.