Brownwood residents, who have been under outdoor watering restrictions for almost a year, may get an “open watering” day later this month in order to help the Brown County Water Improvement District No. 1 test out its new treatment plant before acceptance.

General Manager Dennis Spinks told the water board Tuesday evening that the plant needs to generate 7.5 million gallons or more a day in the test, and typical usage on the Mondays and Tuesdays when watering is allowed on an odd-even address basis is only about 7 million gallons.

Customers will still pay for the water they use, but they will not be limited on its use.

Other retail water delivery services that obtain treated water wholesale from the district have high-use surcharges, so they will not participate.

With Lake Brownwood 12.87 feet below spillway, the district is in a Stage 3 drought contingency plan. Even so, the lake level is about 1.9 feet above the level where it was at this time in 2011, Spinks said.