washington/chicago head midwest region u.s. environmental protection agency offer resignation water contamination crisis flint michigan agency say thursday issue emergency order resolve grow problem susan hedman second official resign since crisis unfold play memo epa employee say test show high level lead city water tell flint michigan administrators draft report hedman resignation take effect feb. epa say agency announcement hedman white house say president barack obama ensure officials hold accountable wrongdoing find epa thursday issue emergency order require michigan city flint take immediate step determine response crisis inadequate protect human health direction state-appointed emergency manager flint work class mostly african-american city 100,000 north detroit switch water supply flint river 2014 save money river know locally dump grind corrosive river water treat cause lead leach city age water pip detroit water city tap previously complaints water begin within month change officials take step remedy situation october 2015 test show elevate level lead tap water city children lead neurotoxin damage brain cause health problems city switch back detroit water mid october contamination continue flint crisis push epa administrator gina mccarthy thursday issue new policy elevate issue appear substantial threat public health authorities appear unable address strength become weakness interpret responsibility end simple technical compliance mccarthy say memo epa staff epa inspector general agree evaluate midwest office public water system supervision program implementation state oversight representative jason chaffetz chairman house oversight government reform committee say epa rife incompetence region exception mismanagement plague region far long ms. hedman resignation way overdue white house spokesman josh earnest note justice department investigate contamination flint water supply tell reporters obama make sure epa officials hold responsible errors may uncover end next week michigan would access 80 million water infrastructure fund agree last month bipartisan budget obama tell group mayors white house michigan governor rick snyder officials call testify next month congressional panel u.s. representative brenda lawrence democrat request feb. hear house oversight government reform committee last week say spokeswoman tracy manzer invitation specifically governor send representative behalf manzer say however republicans committee say nothing hear set stone yet committee website calendar detail discuss hear flint entirely premature say spokesman republicans committee want name confirm detail time particularly respect date witness invitations spokesman say dan wyant former director michigan department environmental quality among invite wyant resign december grow crisis flint hear identify precisely go wrong process ensure responsible hold accountable never happen manzer say snyder republican reject call critics resignation crisis ask michigan state legislature week approve 28 million assist flint say would additional fund request michigan house approve fund unanimously wednesday bill senate thursday recent weeks michigan department health human service also say see increase legionnaires disease case county include flint cover period river water primary source could conclude case relate water switch report release thursday find 87 legionnaires case county june 2014 october include nine deaths epa official resign flint water crisis