Coronavirus levels in California’s wastewater now exceed last summer’s peak, an indication of the rapid spread of the super-contagious new FLiRT strains. California has “very high” coronavirus levels in its wastewater — one of 21 states in that category, up from seven the prior week, according to estimates published Friday by the U.S.

Centers for Disease Control and Prevention. That means about 155 million people — nearly half of America’s population — live in areas with “very high” coronavirus levels in sewage. Besides California, the other states with “very high” levels are Alaska, Colorado, Connecticut, Florida, Hawaii, Idaho, Louisiana, Maryland, Minnesota, Nevada, New Hampshire, New Mexico, North Carolina, Oregon, Texas, Utah, Vermont, Washington, West Virginia and Wyoming.

Washington, D.C., is also in that category.

Coronavirus levels in wastewater are also surging in Los Angeles County — and the rate of increase has been accelerating. The county also has seen notable jumps this month in newly confirmed infections, coronavirus-positive hospitalizations and the share of emergency room visits attributable to COVID-19. Nationally, overall viral levels in wastewater are considered “high” for the second straight week, the CDC said.

The estimates are subject to change as more data come in. Most Americans probably know a family member, friend, co-worker or acquaintance who has come down with COVID-19 recently, perhaps being infected while travelin.