Montgomery County, Illinois: drinking water report. Montgomery County sits in south-central Illinois, where communities like Hillsboro, Litchfield,
Montgomery County sits in south-central Illinois, where communities like Hillsboro, Litchfield, Nokomis, and Raymond draw water from a mix of groundwater wells and surface water sources. The county's water infrastructure varies from small municipal systems serving towns of a few thousand residents to rural households on private wells, creating a patchwork of monitoring coverage and treatment capabilities. Like much of central Illinois, the region's agricultural landscape means fertilizer runoff, nitrates, and legacy contamination warrant close attention.
Illinois requires public water systems to test for PFAS under EPA's UCMR5 sampling program, and early results from across the state show detections in roughly 20 percent of systems tested. Montgomery County's municipal utilities face similar risks, particularly systems that have served industrial areas or used aqueous film-forming foam (AFFF) near fire training sites. Groundwater wells in agricultural counties like Montgomery also carry elevated nitrate risk from decades of fertilizer application, with spring and early summer typically showing the highest levels as precipitation pushes contaminants through soil layers.
Lead in drinking water remains a concern for older homes built before 1986, when federal law banned lead solder in plumbing. Illinois Community Water Supply violations data shows that small systems sometimes struggle with consistent lead and copper rule compliance, particularly in towns with aging infrastructure and limited rate revenue for system upgrades. Private well owners in Montgomery County (estimated at several hundred households) receive no regulatory monitoring unless they test voluntarily, leaving gaps in understanding rural exposure to nitrates, bacteria, and emerging contaminants.
Disinfection byproducts form when chlorine used to treat water reacts with organic matter, creating compounds like trihalomethanes. Systems drawing from surface water or shallow wells with higher organic content tend to show elevated levels. Montgomery County's utilities generally meet EPA standards, but seasonal variation occurs, and long-term exposure even within legal limits prompts some residents to consider point-of-use filtration.
Test private wells annually for nitrates and bacteria, and every three to five years for a broader panel including PFAS if your budget allows. For municipal water customers, request your utility's latest Consumer Confidence Report to see what contaminants were detected and how levels compare to health guidelines. Check your water to see current data for your ZIP code, review our water filter guide to match filtration technology to specific contaminants, and explore the detailed report for Montgomery County's testing history. Visit the Illinois state page for context on statewide water quality patterns and regulatory updates.