The PH level of water of Goldstream Provincial Park

Those two PH test's water are come from Canada Goldstream Provincial Park, but different location.
The right is the come from the water near the road that mean probably affect by the crude oil, but precentage will fewer pollute than the other one.
Its indicate the PH level of 7.
The left is actually come from the lake which is completely influent by crude oil, the pollution of precentage is much more as indicate thePH level as 6.
However, the best PH level for the salmon is 8, now we can totally understand why this accident atleast influent the salmon for 4 year.