the minimum ph of fester hollow is 7.06 and the median ph is 7.66. the maximum ph of the stream is 9.17, making it the most alkaline stream in the watershed of briar creek. the total concentration of dissolved solids in fester hollow ranges from 34 to 169 parts per million. the median concentration is 44 parts per million. the stream also has higher-than-ideal concentrations of nitrates.