The EPA is complicating a water regulation by proposing two thresholds at which utilities must take steps to replace lead pipes and make tap water less corrosive, water utility representatives and state officials told the agency.
The Environmental Protection Agency currently requires water utilities to replace lead pipes when the metal’s concentrations exceed 15 parts per billion (ppb) in at least 10% of the sampled tap water.
Under its Nov. 13 proposal (RIN 2040-AF15) to revise the 1991 lead and copper rule, the EPA inserted a trigger level, or warning bell, for utilities approaching the action level of ...
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