Reporters with the USA TODAY Network traveled to ... SAN DIEGO, CA, and TIJUANA, Mexico — Border Patrol agent Justin Castrejon points to a spot west of the San Ysidro pedestrian crossing where a year ...

The design-build team of Stantec and PCL Construction says they can expand San Diego's South Bay International Wastewater ...

A company called Admicarga oversees trains that now cross the border to and from Mexico ... US, its products Antonio Otáñez, director of Admicarga, told the El Sol Newspaper in Tijuana their ...

"The Tijuana River region is a very dynamic environment with implications for public health, environmental policy and international relations between the United States and Mexico," Cooper said.

A study by UC San Diego researchers reveals that pollutants found in the sewage-laden Tijuana River are ending up in the air near the U.S.-Mexico border in San Diego County.

"The Tijuana River region is a very dynamic environment with implications for public health, environmental policy and international relations between the United States and Mexico," Cooper said.

The United States’ southern ... different parts of the border. Out west, between San Diego and Tijuana, Mexico, there’s high double fencing to deter people from crossing illegally.

A cross-border sewage crisis affecting Southern California could play a role in a prominent congressional race, where a ...

Large amounts of untreated sewage flow daily from Mexico into Imperial Beach ... the United States built a plant on its side of the border to help treat sewage from Tijuana, which often flowed ...