Langelier Index Summary for Public Water Supplies in Newfoundland

Langelier Index Summary for Public Water Supplies in Newfoundland and Labrador Water Resources Management Division Community Name Bauline <ul style="display: flex;"><li style="flex:1">Serviced Area </li><li style="flex:1">Source Name </li><li style="flex:1">Sample Date </li></ul>May 29, 2020 Langelier Index <ul style="display: flex;"><li style="flex:1">-1.06 </li><li style="flex:1">Bauline </li><li style="flex:1">#1 Brook Path Well </li></ul><ul style="display: flex;"><li style="flex:1">Bay St. George South </li><li style="flex:1">Highlands </li><li style="flex:1">#3 Brian Pumphrey Well </li></ul>Highlands <ul style="display: flex;"><li style="flex:1">May 20, 2020 </li><li style="flex:1">-0.29 </li></ul><ul style="display: flex;"><li style="flex:1">Birchy Bay </li><li style="flex:1">Birchy Bay </li><li style="flex:1">Jumper's Pond </li><li style="flex:1">May 06, 2020 </li></ul>May 01, 2020 May 19, 2020 May 21, 2020 Jun 11, 2020 May 20, 2020 Jun 05, 2020 May 28, 2020 Jun 19, 2020 -2.64 -1.77 -5.85 -3.64 -2.17 -2.41 -2.23 -1.87 -1.88 <ul style="display: flex;"><li style="flex:1">Bonavista </li><li style="flex:1">Bonavista </li><li style="flex:1">Long Pond </li></ul><ul style="display: flex;"><li style="flex:1">Brent's Cove </li><li style="flex:1">Brent's Cove </li><li style="flex:1">Paddy's Pond </li></ul>Centreville-Wareham-Trinity Chance Cove <ul style="display: flex;"><li style="flex:1">Trinity </li><li style="flex:1">Southwest Feeder Pond </li></ul><ul style="display: flex;"><li style="flex:1">Hollett's Well </li><li style="flex:1">Upper Cove </li></ul>Channel-Port aux Basques Clarenville Channel-Port Aux Basques Clarenville, Shoal Harbour Conception Bay South Gull Pond & Wilcox Pond Shoal Harbour River <ul style="display: flex;"><li style="flex:1">Bay Bulls Big Pond </li><li style="flex:1">Conception Bay South </li></ul><ul style="display: flex;"><li style="flex:1">Corner Brook </li><li style="flex:1">Corner Brook (+Massey </li></ul>Drive, +Mount Moriah) Fleur De Lys Trout Pond, Third Pond (2 intakes) <ul style="display: flex;"><li style="flex:1">First Pond, Narrow Pond </li><li style="flex:1">Fleur de Lys </li><li style="flex:1">May 19, 2020 </li></ul>Jun 09, 2020 Jun 09, 2020 Jun 09, 2020 May 25, 2020 May 20, 2020 May 20, 2020 Jun 01, 2020 -3.41 -6.65 -6.54 -6.33 -2.93 -4.98 -3.25 -2.80 <ul style="display: flex;"><li style="flex:1">Fogo Island </li><li style="flex:1">Fogo </li><li style="flex:1">Freeman's Pond </li></ul>Freeman's Pond Freeman's Pond Gander Lake <ul style="display: flex;"><li style="flex:1">Fogo Island </li><li style="flex:1">Fogo </li></ul><ul style="display: flex;"><li style="flex:1">Fogo Island </li><li style="flex:1">Fogo </li></ul><ul style="display: flex;"><li style="flex:1">Gander </li><li style="flex:1">Gander </li></ul>Gander Bay South Gander Bay South Grand Falls-Windsor Gander Bay South - PWDU George's Point, Harris Point Barry's Brook Barry's Brook Grand Falls-Windsor (+Bishop's Falls, Northern Arm Lake +Wooddale, +Botwood, +Peterview) <ul style="display: flex;"><li style="flex:1">Grates Cove </li><li style="flex:1">Grates Cove Centre </li><li style="flex:1">#1C Well </li><li style="flex:1">Jun 09, 2020 </li></ul>May 08, 2020 May 08, 2020 -0.35 -3.17 -3.31 Happy Valley-Goose Bay Happy Valley-Goose Bay Happy Valley-Goose Bay Happy Valley-Goose Bay Spring Gulch Well Field (connect summer 2002) Harbour Grace Harbour Grace Harbour Grace South Lower Harbour Grace South Upper New Southside Well (Well#3) Southside Wellfield (Well #1 & #2) Jun 17, 2020 Jun 17, 2020 -0.29 -0.04 Harbour Grace Labrador City Lewisporte <ul style="display: flex;"><li style="flex:1">Thickett </li><li style="flex:1">#2 Thicket New Well </li><li style="flex:1">Jun 17, 2020 </li></ul>May 12, 2020 May 06, 2020 Jun 08, 2020 May 17, 2020 -0.32 -1.48 -4.00 -4.21 -3.84 Labrador City Lewisporte Lewisporte Marystown Beverly Lake Stanhope Pond <ul style="display: flex;"><li style="flex:1">Stanhope Pond </li><li style="flex:1">Lewisporte </li></ul><ul style="display: flex;"><li style="flex:1">Marystown </li><li style="flex:1">Fox Hill Reservoir / Clam </li></ul>Pond Mount Pearl New Harbour Norris Arm Paradise Mount Pearl New Harbour Norris Arm (south) Paradise <ul style="display: flex;"><li style="flex:1">Bay Bulls Big Pond </li><li style="flex:1">May 28, 2020 </li></ul>May 26, 2020 May 06, 2020 May 28, 2020 Jun 03, 2020 Jun 10, 2020 -1.89 -0.04 -4.42 -1.89 -3.22 -0.33 Williams Hill Well Mill Lake Bay Bulls Big Pond Indian Cove Pond Well Field Point of Bay Port au Choix Point of Bay Port au Choix <ul style="display: flex;"><li style="flex:1">November 18, 2020 </li><li style="flex:1">Page 1 of 3 </li></ul>Langelier Index Summary for Public Water Supplies in Newfoundland and Labrador Water Resources Management Division <ul style="display: flex;"><li style="flex:1">Community Name </li><li style="flex:1">Serviced Area </li><li style="flex:1">Source Name </li><li style="flex:1">Sample Date </li></ul>May 07, 2020 Langelier Index <ul style="display: flex;"><li style="flex:1">0.03 </li><li style="flex:1">Port au Port </li></ul>West-Aguathuna-Felix Cove Portugal Cove-St. Phillips Port au Port West, Aguathuna Portugal Cove-St. Phillips #1 & #3 & #6 FatherJoy's Well <ul style="display: flex;"><li style="flex:1">Bay Bulls Big Pond </li><li style="flex:1">May 28, 2020 </li></ul>Jun 03, 2020 May 24, 2020 May 24, 2020 Jun 18, 2020 Jun 23, 2020 -1.85 -3.85 -2.36 -4.31 -3.41 -0.18 Pouch Cove Ramea Pouch Cove Ramea North Three Island Pond Northwest Pond <ul style="display: flex;"><li style="flex:1">Ramea </li><li style="flex:1">Ramea - PWDU </li></ul>Reidville Northwest Pond <ul style="display: flex;"><li style="flex:1">Reidville </li><li style="flex:1">Humber Canal, Grand Lake </li></ul><ul style="display: flex;"><li style="flex:1">#4 Well - Leonard King Well </li><li style="flex:1">Small Point-Adam's </li></ul>Cove-Blackhead-Broad Cove Blackhead Small Point-Adam's Cove-Blackhead-Broad Cove <ul style="display: flex;"><li style="flex:1">Blackhead </li><li style="flex:1">#4 Well - Leonard King Well </li><li style="flex:1">Jun 23, 2020 </li><li style="flex:1">-0.45 </li></ul><ul style="display: flex;"><li style="flex:1">St. Anthony </li><li style="flex:1">St. Anthony </li></ul>St. John's St. John's St. John's St. Anthony Pond Windsor Lake Jun 16, 2020 May 13, 2020 Jun 19, 2020 May 13, 2020 May 28, 2020 -3.31 -2.24 -2.08 -1.50 -1.70 St. John's St. John's St. John's St. John's Windsor Lake Petty Harbour Long Pond <ul style="display: flex;"><li style="flex:1">Bay Bulls Big Pond </li><li style="flex:1">St. John's (+Mt. Pearl, </li></ul>+Paradise, +Portugal Cove-St. Phillips, +CBS) <ul style="display: flex;"><li style="flex:1">St. Pauls </li><li style="flex:1">St. Pauls </li><li style="flex:1">Two Mile Pond </li><li style="flex:1">Jun 17, 2020 </li></ul>Jun 19, 2020 May 07, 2020 Jun 09, 2020 Jun 15, 2020 Jun 15, 2020 Jun 15, 2020 Jun 15, 2020 Jun 15, 2020 -1.37 -2.01 0.02 Steady Brook Stephenville Terrenceville Wabana Steady Brook Stephenville Terrenceville Wabana Wellfield + Steady Brook Well Field <ul style="display: flex;"><li style="flex:1">Big Brook </li><li style="flex:1">-5.38 </li></ul>-0.02 0.09 #3 Yard West Mines Road <ul style="display: flex;"><li style="flex:1">Mixed Supplies </li><li style="flex:1">Wabana </li><li style="flex:1">Wabana </li></ul><ul style="display: flex;"><li style="flex:1">Wabana </li><li style="flex:1">Wabana </li><li style="flex:1">Mixed Supplies </li><li style="flex:1">-0.07 </li></ul><ul style="display: flex;"><li style="flex:1">0.00 </li><li style="flex:1">Wabana </li><li style="flex:1">Wabana </li><li style="flex:1">Mixed Supplies </li></ul><ul style="display: flex;"><li style="flex:1">Wabana </li><li style="flex:1">Wabana - PWDU </li><li style="flex:1">#3 Yard West Mines Road </li><li style="flex:1">-5.10 </li></ul><ul style="display: flex;"><li style="flex:1">November 18, 2020 </li><li style="flex:1">Page 2 of 3 </li></ul>Langelier Index Summary for Public Water Supplies in Newfoundland and Labrador Water Resources Management Division <ul style="display: flex;"><li style="flex:1">Community Name </li><li style="flex:1">Serviced Area </li><li style="flex:1">Source Name </li><li style="flex:1">Sample Date </li><li style="flex:1">Langelier Index </li></ul>What is the Langelier Index? The Langelier index (LI) is an approximate measure of the degree of saturation of calcium carbonate in water. It is calculated using the pH, alkalinity, hardness, total dissolved solids, and water temperature of a water sample collected at the tap. If the; · LI is negative: The water is under saturated with calcium carbonate and will tend to be corrosive in the distribution system · LI is positive: The water is over saturated with calcium carbonate and will tend to deposit calcium carbonate forming scales in the distribution system · If LI is close to zero: The water is just saturated with calcium carbonate and will neither be strongly corrosive or scale forming. The LI is one of several tools used by the water operator for stabilizing water to control both internal corrosion and the deposition of scale. Experience has shown that LI in the range of -1 to +1 has a relatively low corrosion impact on metallic components of the distribution system. LI values outside this range may result in laundry stains or leaks. For additional information on the Langelier Index please contact the Department of Municipal Affairs and Environment at 729-2563. <ul style="display: flex;"><li style="flex:1">November 18, 2020 </li><li style="flex:1">Page 3 of 3 </li></ul>

Langelier Index Summary for Public Water Supplies in Newfoundland

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