Licking County, Ohio: drinking water report. Licking County encompasses Newark (the county seat), Heath, Granville, and dozens of smaller communities
Licking County encompasses Newark (the county seat), Heath, Granville, and dozens of smaller communities across central Ohio. The region relies on a mix of surface water from area reservoirs and the Licking River, along with groundwater wells serving rural households. Water supply infrastructure varies significantly between the Newark area's municipal systems and the private wells that serve roughly a quarter of county residents.
Central Ohio counties face documented challenges with agricultural runoff, aging distribution systems, and emerging contaminants that warrant ongoing attention. The region's combination of farming activity and industrial history creates multiple potential exposure pathways. Nitrate contamination from fertilizer application remains a persistent concern for private well users in agricultural areas, while older municipal systems in places like Newark grapple with infrastructure built decades before current standards existed.
Lead service lines remain present in some older neighborhoods throughout the county, particularly in areas developed before 1986 when lead solder and pipes were still common. Ohio's lead and copper rule testing has identified elevated readings in communities with similar building stock. Private well owners face different challenges, as these systems fall outside EPA regulation and require voluntary testing. Agricultural chemicals, bacteria from septic systems, and naturally occurring minerals like manganese can all affect groundwater quality depending on local geology and land use patterns.
PFAS contamination has emerged as a statewide concern following testing under EPA's fifth Unregulated Contaminant Monitoring Rule. While comprehensive county-level PFAS data remains limited, Ohio's detection rates suggest these forever chemicals appear in both groundwater and surface water sources across the state. The Licking Valley's mix of industrial sites, military facilities in the region, and widespread use of firefighting foam at airports creates potential PFAS sources similar to other central Ohio counties.
Anyone served by private wells should test annually for bacteria and nitrates, with periodic screening for other contaminants based on nearby land use. Municipal water customers can request recent testing results from their utility and consider point-of-use filtration for specific concerns like lead or emerging contaminants. Check your water for current data specific to your ZIP code, review our water filter guide for treatment options matched to different contaminants, access a detailed report showing testing history and violations, or visit the Ohio state page for broader context on water quality patterns across the state.