Six citizen environmental groups have submitted a letter to Austin city leaders asking them to continue negotiations with Dripping Springs for a potential no-discharge solution.

The letter came as the six organizations, which include Protect Our Water (POW) and the Save our Springs Alliance (SOS), reasserted their opposition to the city’s discharge permit that was originally addressed in an October 2016 letter.

According to a press release, the letter was sent in light of a “possible...