Mississippi Tap Water Quality Report

Drinking water quality in Mississippi is widely considered to be above the national average, maintaining an impressive composite safety score of 80.8/100 across its 532 monitored ZIP codes. Based on the latest records from the EPA's Safe Drinking Water Information System (SDWIS), a remarkable 43% of ZIP codes in Mississippi have earned an "A" grade. This reflects strong regulatory compliance, robust municipal water treatment infrastructure, and generally low levels of detected health-based contaminants across most communities in the state.

The state's water infrastructure has experienced significant compliance hurdles recently, logging a staggering 1,109 health-based violations over the past 5-year monitoring window out of 3,537 total violations. When a state registers this volume of health-based violations, it often points to systemic challenges such as aging distribution networks, agricultural runoff affecting groundwater, or underfunded rural water systems. Mississippi State Department of Health is responsible for enforcing corrective actions and penalizing systems that repeatedly fail to meet safe drinking water standards.

Fortunately, the risk of widespread lead exposure in Mississippi's municipal water is relatively low compared to other states, with only 21.6% of ZIP codes falling into the High or Very High risk categories. However, because lead primarily enters drinking water through the corrosion of individual home plumbing rather than the main municipal supply, residents living in homes built prior to 1986 should still exercise caution. Using a standard carbon block filter and running the tap for 30 seconds each morning remains a recommended best practice for all households.