Public Notice • July 20, 2020 - Verner Water Treatment Update

 

Public Notice 
Verner Water Update

July 20, 2020 

The Verner Water Treatment Plant has been running a trial using potassium permanganate in combination with chlorine dioxide to remove manganese, as part of the treatment process.  The plant started adding potassium permanganate on June 9, 2020.  Manganese is a dissolved element in the raw water that causes discolouration.  High levels of manganese are a seasonal problem, and usually peak in July or August.

The latest testing at the Verner Water Plant has shown great results, measuring well below our targets for colour and manganese.The use of potassium permanganate has greatly improved the discolouration and appears to be effective at removing the manganese in the water. 

Last year, we were experiencing discoloration in the water distribution system under these conditions. The table below compares last year’s manganese concentrations with this year’s levels. 

Residents experience disclouration in the water when the Point of Entry (POE – where drinking water leaves the plant and entering the town) concentrations are above 100µg/L.

DATE

RAW WATER [µG/L]

POE [µG/L]

 July 15, 2019

466

132

 July 29, 2019

924

230

July 4, 2020

424

35

July 6, 2020

532

53

July 7, 2020

450

46

July 8, 2020

523

29

July 9, 2020

297

49

Latest results on July 16, 2020

759

65

Cache Bay • Crystal Falls • Desaulniers • Field • Kipling • Lavigne • North Monetville • River Valley • Sturgeon Falls • Verner