For individual water quality parameters, this table specifies upper thresholds for mapping well locations with color symbols. Values exceeding field yellow will be marked in red.
| TNCode | CODE | NAME | blue | green | yellow |
|---|---|---|---|---|---|
| M01 | 1 | 100 | 500 | 1000 | |
| M03 | 95 | Conductivity (µmhos/cm @ 25°C) | 750 | 1500 | 2000 |
| M03 | 403 | pH - Lab | 6.5 | 7.5 | 9 |
| M03 | 440 | Bicarbonate as HCO3 (Lab) | 200 | 300 | 400 |
| M03 | 445 | Carbonate ion (as CO3) | 0.1 | 5 | 10 |
| M03 | 916 | Calcium - Total Ca | 25 | 50 | 100 |
| M03 | 927 | Magnesium - Total Mg (mg/l) | 25 | 50 | 80 |
| M03 | 929 | Sodium - Total Na (mg/l) | 50 | 200 | 400 |
| M03 | 937 | Potassium - Total K (mg/l) | 5 | 10 | 20 |
| M03 | 940 | Chloride - Total Cl | 100 | 200 | 400 |
| M03 | 945 | Sulfate - Total as SO4 | 50 | 200 | 400 |
| M03 | 71850 | Nitrate - Total as NO3 | 2 | 10 | 20 |