WQP url parsing
This works:
nutrient <- readWQPdata(statecode="US:55",characteristicType="Nutrient",
siteType="Lake,+Reservoir,+Impoundment")
But this doesn't:
nutrient <- readWQPdata(statecode="US:55",characteristicType="Nutrient",
siteType="Lake%2C+Reservoir%2C+Impoundment")
which is what you'd copy from the WQP itself.