Methane is a flammable gas found in natural gas. It can enter water from underground sources or fracking operations. In high amounts, it poses explosion risks.

Methane is a colorless, odorless gas that's the primary component of natural gas. It can enter water supplies through natural underground seepage or from human activities like fracking. While not typically harmful if ingested in small amounts, high concentrations can displace oxygen in enclosed spaces, posing safety risks. Water utilities use specialized techniques like gas chromatography to detect methane. Regulations for methane in drinking water vary, as it's not considered a health-based contaminant by the EPA but may be monitored due to explosion risks.