Written by local reporter, Kathy Portie of the Big Bear Grizzly. Good article regarding a potential problem for the Big Bear Municipal Water District…
Big Bear Lake is known as a trout fishery, but there are other fish that call the mountain reservoir home. One species in particular is creating a potential problem for the Big Bear Municipal Water District.
Bass tissue samplings taken in Big Bear Lake between 1984 and 2005 show levels of mercury above the accepted threshold of 0.3 parts per million. Of 18 samples taken during the period, the average was 0.362.
What that means, according to MWD General Manager Scott Heule, is a potential for one in 1 million mercury-related deaths for those who consume more than 18 ounces a month of Big Bear Lake-caught bass.
Heule has doubts a person can consume that much Big Bear Lake bass in a month. Bass are predominantly warm-water fish that do not grow big in colder waters such as Big Bear Lake, Heule said. There just aren’t that many bass in the lake. “There’s a real problem with the numbers,” Heule said. “On the surface, it’s scary, but let’s say a person fishes specifically for bass on Big Bear Lake and eats more than 18 ounces a month. It would deplete the fishery.”
On Tuesday, Dec. 9, the California Regional Water Quality Control Board hosts a scoping meeting to discuss the Big Bear Lake mercury issue. The California Environmental Quality Act workshop could result in a Water Quality Control Plan for the Santa Ana River Basin amendment to include a mercury TMDL for Big Bear Lake. A TMDL, or total maximum daily load, calculates the maximum amount of a pollutant a water body can receive and safely meet water quality standards.
Incorporating a mercury TMDL for Big Bear Lake could increase MWD costs by about $100,000 a year. “The current nutrient TMDL has obligated the city, county, Caltrans, Forest Service, Bear Mountain, Snow Summit and MWD to huge costs for studies, investigations and monitoring,” Heule said. “The MWD will be spending more than $40,000 in fiscal year 2008-09 just for chemical analysis of lake water samples. The entire Valley pays the price tag for this as well as those who purchase boat permits. The costs for this work become an additional financial burden to everyone who owns property in the Valley or who comes to visit.”
Heule has plenty of questions for the water quality board. “One of our questions is if this is a fish tissue issue, then how does it relate to the Clean Water Act?” Heule said. “We also question whether or not there is significant bass in the lake to even get a person sick. We don’t even know if there was a representative sampling. Our level of confidence in the study is low.”
If a mercury TMDL is implemented, Heule believes the Air Quality District should help pay the expenses. “Mercury is an airborne contaminant,” Heule said. “Eighty-seven percent of the emissions of mercury in the United States are from fossil fuel combustion. Airborne mercury is transported on prevailing winds over long distances.”
Heule said mercury concentrations in Big Bear Lake’s water column and sediments are significantly lower than state, federal and international health standards. “If the regional board concludes that mercury in bass flesh poses a human health concern (in Big Bear Lake), the MWD will do whatever is necessary to inform and advise anglers to take appropriate precautions,” Heule said.
Heule hopes the public, especially anglers who enjoy fishing on Big Bear Lake, attend the meeting on Dec. 9. “It would be good for people to come and get a sense of what fish are affected, the result of the analyses and how sure the regional water quality control board is that it is really a problem,” Heule said.
The Dec. 9 meeting is from 10 to 11:30 a.m. at the MWD board room, 40524 Lakeview Drive in the city of Big Bear Lake. For more information, call the MWD office at 909-866-5796.
Contact reporter Kathy Portie at 909-866-3456, ext. 135, or by e-mail at kportie.grizzly@gmail.com.
RELATED ARTICLES:
Press Enterprise 11/25/2008- Some Bass in Big Bear Lake exceed mercury EPA, state recommended levels





















































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