A northwest Bexar County nonprofit, the Scenic Loop-Helotes Creek Alliance, filed incident reports with federal, state, and local agencies over apparent stormwater runoff from a development project following recent heavy rainfall.

Concerns Over Water Quality

The reports cover a June 13-15 storm event in and around Grey Forest that produced more than four inches of rain. Residents reported creeks turning a “pale, milky, muddy color” and an unusual odor at the Grey Forest swimming hole — conditions they said are inconsistent with normal stormwater.

The flooding also carried visible silt downstream, which raised residents’ concerns about water quality, aquatic habitat, and public health. The reports point to active construction sites at Guajolote Ranch, a Lennar Homes development project, as the suspected source.

The main concern was the flooding of Helotes Creek and its tributary, Cates Creek. The alliance is requesting immediate site inspections, water quality sampling of Cates Creek, Helotes Creek, and Grey Forest’s swimming hole. If violations have been found, the group is also asking for enforcement action.

Original reporting: San Antonio, TX News (HLL/CB) — read the source article.