▁in ▁the ▁waters ▁of ▁Spring ▁Brook ▁between ▁the ▁Wat res ▁Dam ▁and ▁the ▁N es b itt ▁Res er voir ▁is ▁ 1 1 ▁mill igr ams ▁per ▁liter . ▁In ▁the ▁ 1 9 7 0 s , ▁the ▁stream ' s ▁p H ▁r anged ▁from ▁ 6 . 4 ▁to ▁ 6 . 9 . ▁The ▁total ▁concentration ▁of ▁water ▁hard ness ▁r anged ▁from ▁ 2 3 ▁to ▁ 2 8 ▁mill igr ams ▁per ▁liter . ▁The ▁tur bid ity ▁of ▁the ▁stream ▁at ▁the ▁community ▁of ▁Spring ▁Brook ▁was ▁one ▁measured ▁to ▁be ▁less ▁than ▁ 5 ▁Jackson ▁Tur bid ity ▁Units . ▁The ▁specific ▁conduct ance ▁of ▁the ▁stream ▁r anged ▁from ▁ 6 0 ▁to ▁ 7 8 ▁micro - si em ens ▁per ▁cent imeter ▁at ▁ ▁during ▁five ▁measurements ▁in ▁the ▁ 1 9 7 0 s . ▁The ▁concentration ▁of ▁dissol ved ▁sol ids ▁in ▁the ▁stream ▁was ▁measured ▁to ▁be ▁ 5 4 ▁mill igr ams ▁per ▁liter ▁in ▁ 1 9 7 5 . ▁ ▁Geography , ▁ge ology , ▁and ▁climate ▁The ▁elev ation ▁near ▁the ▁mouth ▁of ▁Spring ▁Brook ▁is ▁ ▁above ▁sea ▁level . ▁The ▁elev ation ▁of ▁the ▁stream ' s ▁source ▁is ▁approximately ▁ ▁above ▁sea ▁level . ▁The ▁gradient ▁of ▁the ▁cre ek ▁is ▁ ▁per ▁mile . ▁ ▁The ▁top ography ▁of ▁the ▁waters hed ▁of ▁Spring ▁Brook ▁is ▁mainly ▁mountain ous , ▁with ▁sw amp y ▁land ▁in ▁its ▁upper ▁reaches .