Ayish Bayou at SH 103; 0.8 km East of FM 705.
Segment 0610A – Ayish Bayou (unclassified water body). Ayish Bayou is a 32 mile-length freshwater stream extending from the confluence of Sam Rayburn Reservoir south of San Augustine in San Augustine County to the upstream perennial portion of the stream north of San Augustine in San Augustine County. This stream segment, including the upper, middle, and lower portions, is listed on the 303 (d) list for bacteria. Currently, it is classified under a 5a category. The first year this water body was listed for impairments was 2000.