HUNTERSVILLE, N.C. — Staff with the McDowell Creek Wastewater Treatment Plant estimate close to 127,000 gallons of mostly treated wastewater was released on Friday after a power outage.
Officials with the wastewater treatment plant in Huntersville, N.C. say the plant was out of power for an hour after a tree fell Friday afternoon.
During this time, officials say water was released before going through the the final disinfection process.
The water was treated through four steps of the wastewater treatment process, but had not gone through the final step involving ultraviolet disinfection, according to a news release.
Officials say the wastewater treatment process is as follows:
1. Primary Treatment – Solid particles & objects are captured by screens, grit chambers, and primary clarifiers.
2. Aeration/Secondary Treatment – Wastewater is aerated to support growth of microorganisms that remove harmful pollutants.
3. Clarification – Solids and microorganisms settle out in large basins.
4. Advanced Treatment – Wastewater flows through granular filters to remove fine particles.
5. UV Disinfection – Water is disinfected to remove any remaining pathogens, and then the treated water is released into creeks.