As of October 1, 2024, the California State Water Resources Control Board has implemented a new Maximum Contaminant Level (MCL) for hexavalent chromium (Cr6) in drinking water, set at 0.010 mg/L, or 10 µg/L (ppb). This MCL represents the maximum allowable...
On April 10, 2024, the U.S. Environmental Protection Agency announced the final National Primary Drinking Water Regulation (NPDWR) for six Per- and Polyfluoroalkyl Substances (PFAS), also known as “forever chemicals”. The rule establishes legally enforceable Maximum...
The Santa Cruz Rail Trail, a transformative 32-mile pedestrian and bicycle pathway from Davenport to Watsonville, is making strides toward improved safety and connectivity along the scenic California coast. The team at WHA has been instrumental in advancing the...
The California Environmental Protection Agency, alongside the California Department of Toxic Substances Control and the California State Water Resources Control Board, introduced the Final Draft Supplemental Guidance: Screening and Evaluating Vapor Intrusion...
Basic Information on PFAS What are PFAS? Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals that includes PFOA, PFOS, GenX, and many other chemicals. PFAS have been manufactured and used in a variety of industries around the globe, including...
Horizontal wells can remediate a large area with a single well where dozens or more vertical wells might be necessary to do the same job. This can be a huge advantage where a contaminant plume may be difficult to reach with traditional vertical wells or direct push...
