News

CEC Receives Submission on the Operation to Capture an Animal That Escaped from Captivity in Tepetlaoxtoc, State of Mexico, Mexico

Tiohtià:ke (Montreal), 10 July 2026—On 6 July 2026, a Mexican citizen filed a submission with the Secretariat of the Commission for Environmental Cooperation (CEC) under Chapter 24 of the United States-Mexico-Canada Agreement (USMCA/CUSMA). This submission, the eighth of 2026, marks the highest number of submissions received in a single calendar year since the inception of the SEM process in 1994. In submission SEM-26-008 (Captive Animal...

July 10, 2026

CEC Receives Submission on Hydrocarbon Contamination in Salina Cruz, Oaxaca, Mexico

Tiohtià:ke (Montreal), 30 June 2026—On 22 June 2026, a Mexican citizen filed a submission with the Secretariat of the Commission for Environmental Cooperation (CEC) under Chapter 24 of the United States-Mexico-Canada Agreement (USMCA/CUSMA). The Submitter asserts that Mexico is failing to effectively enforce its environmental laws with respect to the contamination caused by a hydrocarbon spill in the Salina Cruz refinery, in Oaxaca, Mexico....

June 30, 2026

Save the Date: Celebrate 10 Years of the Monarch Blitz!

Mark your calendars: the International Monarch Monitoring Blitz is back for its 10th anniversary! From 31 July to 9 August 2026, join the celebration and help search for monarch butterflies and milkweed plants in your area. This is your chance to get outside and make a real difference for one of North America’s most emblematic species! What is the Monarch Blitz? The Monarch Blitz is...

June 22, 2026

CEC Receives Submission on Hydrocarbon Contamination in Las Choapas, Veracruz, Mexico

Tiohtià:ke (Montreal), 18 June 2026—On 9 June 2026, a Mexican citizen filed a submission with the Secretariat of the Commission for Environmental Cooperation (CEC) under Chapter 24 of the United States-Mexico-Canada Agreement (USMCA/CUSMA). The Submitter asserts that Mexico is failing to effectively enforce its environmental laws with respect to the contamination generated by the explosion of an oil well in the community of Las...

June 18, 2026

CEC Receives Submission on the Lack of Vehicle Emissions Control in Baja California, Jalisco and Nuevo León, Mexico

Tiohtià:ke (Montreal), 16 June 2026—On 8 June 2026, the organizations Colectivo Salud y Justicia Ambiental, Víctimas de la Violencia Vial, Alianza del Aire Nuevo León, and ENLACE, Legislación, Ambiente y Sociedad (collectively, “the Submitters”) filed a submission with the Secretariat of the Commission for Environmental Cooperation (CEC) under Chapter 24 of the United States-Mexico-Canada Agreement (USMCA/CUSMA). In submission SEM-26-005 (Vehicle Emissions Control), the Submitters assert that, by failing to adequately...

June 16, 2026

CEC Receives Submission on the Deterioration of Wetlands in Chalacatepec (Jalisco, Mexico)

Tiohtià:ke (Montreal), 11 June 2026—On 8 June 2026, a Mexican citizen filed a submission with the Secretariat of the Commission for Environmental Cooperation (CEC) under Chapter 24 of the United States-Mexico-Canada Agreement (USMCA/CUSMA). The Submitter asserts that Mexico is failing to effectively enforce its environmental laws, particularly with respect to the protection of the Chalacatepec lagoon, in the state of Jalisco, listed under the...

June 11, 2026