Medora Corporation

THM Removal in Two 300,000 Gallon clearwells - Case study


Courtesy of Medora Corporation

Greater than 60% THM reduction observed
Topics: clearwell, certified tests, chlorine, trihalomethane reduction, stratification

System Overview:
Water flows in series through Clearwell #1 to # 2, then onto distribution.

Tank / Reservoir Build Information:

  • Tank Type: Two (2) Identical, Cylindrical, Steel GST
  • Tank Size (Gallons): 300,000
  • Height (ft.): 16.75
  • Diameter (ft.): 58
  • Roof Type: Flat
  • Baffles: Tanks are divided into four (4) sections.

Disinfectant Type: Chlorine

Conditions: The community conducted a distribution system evaluation for total trihalomethanes (TTHMs).

Concentrations at several locations exceeded the maximum contaminant level of 80 ppb as required by EPA Stage 2 DBPR.

Objectives: To lower their TTHMs to be in compliance with EPA.

Solution: Clearwell #1 & # 2: One (1) Large Frame SN Series THM Removal System

Results: The community has conducted certified lab tests during the peak THM season. Results show consistent THM reduction of 60% or more. (See chart below for certified lab test results). The community is pleased with the ongoing results in THM reduction, and is happy with Medora Corporation's service and support as well.

Customer comments

No comments were found for THM Removal in Two 300,000 Gallon clearwells - Case study. Be the first to comment!