Several prominent activists in the “Make America Healthy Again” movement are urging President Trump to fire Lee Zeldin, the administrator of the Environmental Protection Agency, over his decisions to loosen restrictions on harmful chemicals. … Kelly Ryerson, a MAHA influencer … said she was initially optimistic that the Trump administration would crack down on PFAS in drinking water, since Mr. Kennedy had crusaded for clean water as the president of the environmental group Waterkeeper Alliance. Instead, the E.P.A. has given water utilities an additional two years, until 2031, to comply with a Biden administration rule limiting two types of PFAS present in drinking water systems.