Percentage of 743 stream water samples collected across 155 sample sites on 12 U.S. Forest Service grazing allotments in northern California which exceeded water quality benchmarks relevant to the study area, specifically, and the nation, broadly.

Results are reported for samples collected across all sample sites (overall) as well as for samples collected at 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].

本研究报告了全采样点位采集的样本（整体数据集），以及为表征各分配区域内特定资源利用活动所布设的监测采样点位的采集样本结果。
* 标注本研究采用的最相关且最新的标准。
a 粪大肠菌群（Fecal coliform, FC）基准值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天周期内采集样本的几何均值（geometric mean, GM）[36]。
b 粪大肠菌群（FC）基准值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天周期内采集样本的中位数[37]。
c 粪大肠菌群（FC）基准值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天周期内采集样本的几何均值[35]。
d 粪大肠菌群（FC）基准值由中央谷区域水质管理委员会（CVRWQCB）与北海岸区域水质管理委员会（NCRWQCB）联合制定，最大阈值不得在30天周期内超过10%的样本量[35]。
e 大肠杆菌（E. coli）基准值由美国环境保护署（U.S. Environmental Protection Agency, USEPA）[34]制定，对应每1000名直接接触型休闲参与者的估计感染率为32例，基于30天周期内采集样本的几何均值。
f 大肠杆菌（E. coli）基准值由美国环境保护署（USEPA）[34]制定，对应每1000名直接接触型休闲参与者的估计感染率为36例，基于30天周期内采集样本的几何均值。
g 大肠杆菌（E. coli）基准值由美国环境保护署（USEPA）[34]制定，对应每1000名直接接触型休闲参与者的估计感染率为32例；针对单次瞬时水样，基于目标几何均值近似水质分布的75百分位数。
h 大肠杆菌（E. coli）基准值由美国环境保护署（USEPA）[34]制定，对应每1000名直接接触型休闲参与者的估计感染率为36例；针对单次瞬时水样，基于目标几何均值近似水质分布的75百分位数。
i 大肠杆菌（E. coli）基准值由美国环境保护署（USEPA）[34]制定，对应每1000名直接接触型休闲参与者的估计感染率为32例；基于目标几何均值近似水质分布的90百分位数。
j 大肠杆菌（E. coli）基准值由美国环境保护署（USEPA）[34]制定，对应每1000名直接接触型休闲参与者的估计感染率为36例；基于目标几何均值近似水质分布的90百分位数。
k 美国环境保护署（USEPA）[38, 39]推荐的以氮计的硝酸盐（NO3-N）最大浓度限值。
l 美国环境保护署（USEPA）[39, 40]推荐的总磷（TP）最大浓度限值。
m 美国环境保护署（USEPA）[39, 41]推荐的以磷计的磷酸盐（PO4-P）最大浓度限值。