Hopkinsville Water Environment Authority provides sewer services for all customers within the City of Oak Grove city limits. Septic tanks are customer responsibility and are not serviced by the City of Oak Grove or HWEA. Residents with septic tanks may reach out to Christian County Health Department at (270) 887-4160 for records. Sewer, water and trash service may also be set up together by printing out the Water Contract Form and coming in person or e-mailing to [email protected] with the required documents (drivers license, social security card and lease).