Cut points follow Palmer & Kaminski, Water (2013) ch. 4 and Martin's
Bru'n Water notes. They're a flavour heuristic and not a measurement, so
this returns no band in two cases: an ion that wasn't measured
(unmeasured), and water with almost none of either ion
(indeterminate, see SULFATE_CHLORIDE_MEANINGFUL_PPM). Zero
chloride falls in the second case. Its infinite ratio comes from dividing by
zero and doesn't mean the water is extremely hoppy.
Ratio
Band
< 0.5
too malty
0.5 – 1.0
malty
1.0 – 2.0
balanced
2.0 – 4.0
hoppy / bitter
≥ 4.0
very hoppy, risks harshness
It takes the profile instead of the ratio because both of those checks need
the ppm values and the unmeasured list, and the ratio carries neither.
The standard descriptive bands for SO₄:Cl.
Cut points follow Palmer & Kaminski, Water (2013) ch. 4 and Martin's Bru'n Water notes. They're a flavour heuristic and not a measurement, so this returns no band in two cases: an ion that wasn't measured (
unmeasured), and water with almost none of either ion (indeterminate, see SULFATE_CHLORIDE_MEANINGFUL_PPM). Zero chloride falls in the second case. Its infinite ratio comes from dividing by zero and doesn't mean the water is extremely hoppy.It takes the profile instead of the ratio because both of those checks need the ppm values and the unmeasured list, and the ratio carries neither.