Tijuana Slough coastline closed again after a week San Diego (CNS)-San Diego County officials said that a week after the opening, the coastline near the border was closed again on Sunday due to sewage pollution. Officials said on Sunday that the closure affected all coastlines in Tijuanaslaw National Wildlife Refuge and Border Wilderness State Park. According to the San Diego County Department of Environmental Health and Quality, the seawater samples exceeded state health standards. The closure includes all beaches from the international border to the southern end of Coastal Avenue. The closed sign will remain until the seawater sampling results meet the state’s health standards for recreational use.