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. Author manuscript; available in PMC: 2020 Jul 7.
Published in final edited form as: J Am Water Works Assoc. 2018 Oct 1;110(10):E1–E15. doi: 10.1002/awwa.1109

TABLE 2:

Copper-to-phosphate molar ratio ranges for each DIC and pH.

Approximate PO4 Range—mg/L Cu:PO4 Molar Ratio pH
DIC 10 mg C/L
0.5–3 3.18±0.54 6.77
0.5–3 3.32±0.52 7.60
0.5–3 3.37±0.50 8.36
DIC 50 mg C/L
1–5 4.34±1.80 6.77
1–4 3.83±0.31 7.54
0.5–4 3.70±0.54 8.32
DIC 100 mg C/L
1–5 4.15±2.37 6.74
1–4 4.70±1.11 7.59
1–4 4.72±0.82 8.34

Cu—copper, DIC—dissolved inorganic carbon, PO4—phosphate