San Francisco Estuary Inst i tute, Richmond, CA, USA.
Water Environ Res. 2015 Apr;87(4):334-46. doi: 10.2175/106143015X14212658613721.
Contaminant concentrations from the Sacramento-San Joaquin River watershed were determined in water samples mainly during flood flows in an ongoing effort to describe contaminant loads entering San Francisco Bay, CA, USA. Calculated PCB and total mercury loads during the 6-year observation period ranged between 3.9 and 19 kg/yr and 61 and 410 kg/yr, respectively. Long-term average PCB loads were estimated at 7.7 kg/yr and total mercury loads were estimated at 200 kg/yr. Also monitored were PAHs, PBDEs (two years of data), and dioxins/furans (one year of data) with average loads of 392, 11, and 0.15/0.014 (OCDD/OCDF) kg/yr, respectively. Organochlorine pesticide loads were estimated at 9.9 kg/yr (DDT), 1.6 kg/yr (chlordane), and 2.2 kg/yr (dieldrin). Selenium loads were estimated at 16 300 kg/yr. With the exception of selenium, all average contaminant loads described in the present study were close to or below regulatory load allocations established for North San Francisco Bay.
萨克拉门托-圣华金河流域的污染物浓度主要在洪水期间的水样中确定，这是一项持续努力，旨在描述进入美国加利福尼亚州旧金山湾的污染物负荷。在 6 年的观测期间计算出的 PCB 和总汞负荷范围分别为 3.9 至 19 千克/年和 61 至 410 千克/年。长期平均 PCB 负荷估计为 7.7 千克/年，总汞负荷估计为 200 千克/年。还监测了多环芳烃、二恶英/呋喃（一年的数据）和多溴二苯醚（两年的数据），平均负荷分别为 392、11 和 0.15/0.014（OCDD/OCDF）千克/年。有机氯农药负荷估计为 9.9 千克/年（DDT）、1.6 千克/年（氯丹）和 2.2 千克/年（狄氏剂）。硒负荷估计为 16300 千克/年。除了硒之外，本研究中描述的所有平均污染物负荷都接近或低于为北旧金山湾制定的监管负荷分配。
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