Washington City backs regional reuse, pipeline and irrigation plans as drought and growth pressure water system

Washington City leaders moved forward Jan. 22 on several major water projects intended to expand reuse, protect drinking supplies and reduce the risk of large outages as the area grows.

The City Council unanimously approved a reuse authorization contract with the Washington County Water Conservancy District and adopted the Washington City Secondary Water Irrigation Master Plan. Councilors also authorized staff to bid a separate critical culinary transmission-line replacement after recent breakage exposed vulnerabilities in lines that supply much of the city’s water north of the Virgin River.

Those actions follow a detailed workshop update from the county district showing how a phased reuse system, new reservoirs and large interconnection pipelines will feed both secondary (non-potable) and, later, purified potable supplies back into the city’s drinking-water system.

“Type 1” reuse and potable reuse: what the district plans Morgan Drake and Trinity, both with the Washington County Water Conservancy District, told the council the program relies first on expanded “Type 1” reuse — wastewater treated to Utah’s Type 1 standard and used outdoors for irrigation and for agricultural exchanges — then on advanced water purification to return treated reuse into drinking-water reservoirs (an approach often described as indirect potable reuse).

Drake outlined a phased timeline. Early expansion beginning next year will rely on upgrades at Confluence Park and Graveyard Wash to boost available reuse; a large step in the district’s model arrives around 2030 when pipelines and pumping come online to deliver larger…