Wastewater facilities are making important strides in upgrading security, but are failing to address potential threats to collection systems, a Government Accountability Office report says. The GAO study, released May 1, is based on a survey of more than 200 large wastewater treatment facilities.

Facilities cited a shortage of funds to enhance security across large collection areas with multiple access points. Upgrades could include manhole locks and sensors. Federal law governing wastewater security is limited compared with drinking water security requirements, but many facilities are making gains. Security assessments aren’t required, but 74% of responding facilities completed, have under way, or plan to carry out such reviews.