Bass found in a dozen Connecticut lakes contain high levels of mercury, report shows Posted August 8, 2023 The good news: Mercury levels in largemouth bass are declining. The bad news: there are still several water bodies in Connecticut with largemouth bass that have unhealthy levels of Mercury and this new data shows that the decline of levels in fish tissue is not keeping up with the decline in atmospheric levels of mercury., CT Insider, July 26, 2023