The Columbia Riverkeeper filed a lawsuit accusing a timber company of violating stormwater quality laws at its Longview mill, the group said Monday in a news release. The Clean Water Act case alleges that Weyerhaeuser NR Company went against state and federal laws when it dumped too many pollutants into the Columbia River Basin, according to court documents from the case. State and federal laws limit facilities’ output of Biochemical Oxygen Demand, oil and grease, pH levels and settleable solids because these pollutants can bring unwanted debris and chemicals into local waterways, posing a “significant threat to sensitive salmon habitat,” according to Riverkeeper’s news release.