Fish communities and related environmental conditions of the lower Boise River, southwestern Idaho, 1974-2004

MacCoy, Dorene E.

doi:10.3133/sir20065111

Cited by 8 publications

(8 citation statements)

References 48 publications

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“…The RFI score of 58 for Mason Creek is comparable to RFI scores calculated for the Boise River reach near Middleton, indicating intermediate biotic integrity (MacCoy, 2006). The lack of sculpin, which is a heavily weighted metric for the RFI, and the presence of invasive and tolerant species in Mason Creek at Wells Road (site M2) probably influenced the lower intermediate score.…”

Section: Biological Monitoring Resultsmentioning

confidence: 48%

Water-quality and biological conditions in selected tributaries of the Lower Boise River, southwestern Idaho, water years 2009-12

Etheridge¹,

MacCoy²,

Weakland³

2014

Scientific Investigations Report

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Section: Biological Monitoring Resultsmentioning

confidence: 48%

Water-quality and biological conditions in selected tributaries of the Lower Boise River, southwestern Idaho, water years 2009-12

Etheridge¹,

MacCoy²,

Weakland³

2014

Scientific Investigations Report

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“…The targeted fish species were based on the Idaho Department of Environmental Quality 2005recommendation that fish tissue samples should be representative of the Hg exposures likely encountered from recreational or subsistence fishing, and upon previous fish sampling at selected locations in the Boise and Snake Rivers and Brownlee Reservoir (table 2; Clark and Maret, 1998;Richter and Chandler, 2003;MacCoy, 2006).…”

Section: Targeted Fish Speciesmentioning

confidence: 99%

Mercury concentrations in water and mercury and selenium concentrations in fish from Brownlee Reservoir and selected sites in the Boise and Snake Rivers, Idaho and Oregon, 2013–15

Williams¹,

MacCoy²

2016

Open-File Report

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Mercury (Hg) analyses were conducted on samples of sport fish and water collected from selected sampling sites in Brownlee Reservoir and the Boise and Snake Rivers to meet National Pollution Discharge and Elimination System (NPDES) permit requirements for the City of Boise, Idaho, between 2013 and 2015. City of Boise personnel collected water samples from six sites between October and November 2013 and 2015, with one site sampled in 2014. Total Hg concentrations in unfiltered water samples ranged from 0.48 to 8.8 nanograms per liter (ng/L), with the highest value in Brownlee Reservoir in 2013. All Hg concentrations in water samples were less than the U.S. Environmental Protection Agency (USEPA) Hg chronic aquatic life criterion of 12 ng/L. The USEPA recommended a water-quality criterion of 0.30 milligrams per kilogram (mg/kg) methylmercury (MeHg) expressed as a fish-tissue residue value (wet-weight MeHg in fish tissue). The Idaho Department of Environmental Quality adopted the USEPA's fish-tissue criterion and established a reasonable potential to exceed (RPTE) threshold 20 percent lower than the criterion or greater than 0.24 mg/kg Hg based on an average concentration of 10 fish from a receiving waterbody. NPDES permitted discharge to waters with fish having Hg concentrations exceeding 0.24 mg/kg are said to have a reasonable potential to exceed the water-quality criterion and thus are subject to additional permit obligations, such as requirements for increased monitoring and the development of a Hg minimization plan. The Idaho Fish Consumption Advisory Program (IFCAP) issues fish advisories to protect general and sensitive populations of fish consumers and has developed an action level of 0.22 mg/kg Hg in fish tissue. Fish consumption advisories are water body-and species-specific and are used to advise allowable fish consumption from specific water bodies. The geometric mean Hg concentration of 10 fish of a single species collected from a single water body (lake or stream) in Idaho is compared to the action level to determine if a fish consumption advisory should be issued. The U.S. Geological Survey collected and analyzed individual fillets of mountain whitefish (Prosopium williamsoni), rainbow trout (Oncorhynchus mykiss), smallmouth bass (Micropterus dolomieu), and channel catfish (Ictalurus punctatus) for Hg. The 2013 average Hg concentration for small mouth bass (0.32 mg/kg) collected at Brownlee Reservoir and for channel catfish (0.33 mg/kg) collected at the Boise River mouth, exceeded the Idaho water quality criterion (>0.3 mg/kg), the Hg RPTE threshold (>0.24 mg/kg), and the IFCAP action level (>0.22 mg/kg). Average Hg concentrations in fish collected in 2014 or 2015 did not exceed evaluation criteria for any of the species assessed. Selenium (Se) analysis was conducted on one composite fish tissue sample per site to assess general concentrations and to provide information for future risk assessments. Composite concentrations of Se in fish tissue collected between 2013 and 2015 ranged from 0.07 and 0.49...

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“…The fish species to be targeted in this monitoring plan are listed in table 4. The selection of target species was based on both the Idaho Department of Environmental Quality (2005) recommendation that fish tissue samples should represent the mercury exposures likely encountered from recreational or subsistence fishing and on the results of previous fish sampling at these locations (table 1; Clark and Maret, 1998;Richter, 2003;MacCoy, 2006). The goal is to collect 10 harvestable-size fish of a target species for individual mercury analysis.…”

Section: Target Speciesmentioning

confidence: 99%

Monitoring plan for mercury in fish tissue and water from the Boise River, Snake River, and Brownlee Reservoir, Idaho and Oregon

Mebane¹,

MacCoy²

2013

Open-File Report

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The methylmercury criterion adopted as a water-quality standard in the State of Idaho is a concentration in fish tissue rather than a concentration in water. A plan for monitoring mercury in fish tissue and water was developed to evaluate whether fish in the Boise River, Idaho, upstream and downstream of wastewater-treatment plant discharges, meet the methylmercury water-quality criterion. Monitoring also will be conducted at sites on the Snake River, upstream and downstream of the confluence with the Boise River, and in Brownlee Reservoir, which lies along the border between Idaho and Oregon. Descriptions of standard procedures for collecting and processing samples and qualityassurance steps are included. This monitoring plan is intended to provide a framework for cooperative methylmercury sampling in the lower Boise River basin.

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Fish communities and related environmental conditions of the lower Boise River, southwestern Idaho, 1974-2004

Cited by 8 publications

References 48 publications

Water-quality and biological conditions in selected tributaries of the Lower Boise River, southwestern Idaho, water years 2009-12

Water-quality and biological conditions in selected tributaries of the Lower Boise River, southwestern Idaho, water years 2009-12

Mercury concentrations in water and mercury and selenium concentrations in fish from Brownlee Reservoir and selected sites in the Boise and Snake Rivers, Idaho and Oregon, 2013–15

Monitoring plan for mercury in fish tissue and water from the Boise River, Snake River, and Brownlee Reservoir, Idaho and Oregon

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