Marion County Public Health Department (MCPHD)
The Marion County Public Health Department (MCPHD) has several programs to monitor water quality and assess trends within and around Marion County (Indianapolis). MCPHD monitors 40 sites within the county with staggered start dates, ranging from 1995 to 2016 (Appendices 1 and X). The ambient sampling program monitors 37 sites, which are sampled quarterly for nutrients, metals, volatile organic compounds, E. coli, and water quality parameters (DO, temp, pH, Spec. Cond, TDS). MCPHD’s herbicide sampling program involves six sites, which are sampled weekly during the growing season (April-September) for nutrients, selected pesticides, metals, and water quality parameters. Most of these sites are also sampled five times per month for E. coli only. In addition, five of these sites are part of MCPHD’s macroinvertebrate sampling program, which is conducted annually. Twelve sites are co-located or are close enough to USGS streamgages to determine loads. Sampling results are updated quarterly on the MCPHD’s website at