Percentage of 155 stream water sample sites on 12 U.S. Forest Service grazing allotments in northern California which had at least one exceedance of water quality benchmarks relevant to the study area, specifically, and the nation, broadly.

Results are reported for all sample sites (overall) as well as for sample sites monitored to characterize specific resource use activities across the allotments. *Indicates the most relevant and contemporary standards for this study.aFecal coliform (FC) benchmark designated by Lahontan Regional Water Quality Control Board (LRWQCB) (based on geometric mean (GM) of samples collected over a 30-day interval) [36].bFC benchmark designated by North Coast Regional Water Quality Control Board (NCRWQCB) (based on a median of samples collected over a 30-day interval) [37].cFC benchmark designated by Central Valley Regional Water Quality Control Board (CVRWQCB) (based on GM of samples collected over a 30-day interval) [35].dFC benchmark designated by CVRWQCB and NCRWQCB (maximum threshold value not to be exceeded by more than 10% of samples over a 30-day interval) [35].eE. coli benchmark designated by U.S. Environmental Protection Agency (USEPA) [34] for an estimated illness rate of 32 per 1,000 primary contact recreators (based on GM of samples collected over a 30-day interval).fE. coli benchmark designated by USEPA [34] for an estimated illness rate of 36 per 1,000 primary contact recreators (based on GM of samples collected over a 30-day interval).gE. coli benchmark designated by USEPA [34] for an estimated illness rate of 32 per 1,000 primary contact recreators (for a single grab sample, approximates the 75th percentile of a water quality distribution based on desired GM).hE. coli benchmark designated by USEPA [34] for an estimated illness rate of 36 per 1,000 primary contact recreators (for a single grab sample, approximates the 75th percentile of a water quality distribution based on desired GM).iE. coli benchmark designated by USEPA [34] for an estimated illness rate of 32 per 1,000 primary contact recreators (approximates the 90th percentile of a water quality distribution based on desired GM).jE. coli benchmark designated by USEPA [34] for an estimated illness rate of 36 per 1,000 primary contact recreators (approximates the 90th percentile of a water quality distribution based on desired GM).k Maximum concentrations of nitrate as nitrogen (NO3-N) recommended by USEPA [38], [39].lMaximum concentrations of total phosphorus (TP) recommended by USEPA [39], [40].mMaximum concentrations of phosphate as phosphorus (PO4-P) recommended by USEPA [39], [41].

本研究报告了所有采样点位（总体统计）以及为表征各分配地块内特定资源利用活动而布设的监测采样点位的结果。
*表示本研究采用的最相关且最新的标准。
a 粪便大肠菌群（Fecal coliform, FC）基准由拉洪坦区域水质管理委员会（Lahontan Regional Water Quality Control Board, LRWQCB）制定，基于30天内采集样本的几何均值（geometric mean, GM）[36]。
b 粪便大肠菌群基准由北海岸区域水质管理委员会（North Coast Regional Water Quality Control Board, NCRWQCB）制定，基于30天内采集样本的中位数[37]。
c 粪便大肠菌群基准由中央谷区域水质管理委员会（Central Valley Regional Water Quality Control Board, CVRWQCB）制定，基于30天内采集样本的几何均值[35]。
d 粪便大肠菌群基准由中央谷区域水质管理委员会与北海岸区域水质管理委员会联合制定，30天内样本超标率不得超过10%的最大阈值[35]。
e 大肠杆菌（E. coli）基准由美国环境保护署（U.S. Environmental Protection Agency, USEPA）[34]制定，对应每1000名直接接触水体的休闲活动参与者预计患病32例，基于30天内采集样本的几何均值。
f 大肠杆菌基准由美国环境保护署[34]制定，对应每1000名直接接触水体的休闲活动参与者预计患病36例，基于30天内采集样本的几何均值。
g 大肠杆菌基准由美国环境保护署[34]制定，对应每1000名直接接触水体的休闲活动参与者预计患病32例，针对单次瞬时水样，近似基于目标几何均值的水质分布75分位数。
h 大肠杆菌基准由美国环境保护署[34]制定，对应每1000名直接接触水体的休闲活动参与者预计患病36例，针对单次瞬时水样，近似基于目标几何均值的水质分布75分位数。
i 大肠杆菌基准由美国环境保护署[34]制定，对应每1000名直接接触水体的休闲活动参与者预计患病32例，近似基于目标几何均值的水质分布90分位数。
j 大肠杆菌基准由美国环境保护署[34]制定，对应每1000名直接接触水体的休闲活动参与者预计患病36例，近似基于目标几何均值的水质分布90分位数。
k 美国环境保护署[38][39]推荐的以氮计的硝酸盐（nitrate as nitrogen, NO3-N）最大浓度限值。
l 美国环境保护署[39][40]推荐的总磷（total phosphorus, TP）最大浓度限值。
m 美国环境保护署[39][41]推荐的以磷计的磷酸盐（phosphate as phosphorus, PO4-P）最大浓度限值。