I need more facts from them on how quickly they responded and all the things they did. Did they do all the things they could have done to protect public health and to protect the amount that ended up in the ocean?

The San Pedro River watershed, an internationally recognized ecological treasure, is a much-valued resource for Arizona, the U.S. and Mexico. We hope to bring water quality improvements to this watershed, and will strive to protect Arizona's water resources for generations to come.

We are pleased to celebrate this achievement with the Navajo Nation. We'll continue to work together to protect and restore vital water resources on tribal land.

Unauthorized filling of wetlands and damming of open waters can have serious environmental consequences. The Santa Clara River is one of the last free-flowing rivers in Southern California. The EPA's action today underscores our commitment to protecting this very important water resource and to work closely with the U.S. Army Corps of Engineers and other resource agencies to achieve this goal.

Permit limits are designed to prevent wastewater discharges from polluting nearby water bodies and harming drinking water resources and habitat. We are confident the Tribal Authority will promptly make the needed corrections to bring these plants into Clean Water Act compliance.