[45]
```
150 12.00 \*

200 7.70 \*

Designated Use Metal Water Hardness (mg/l) Limit (ug/l)

 As 50.0 # As(III) 190.0 \* As(III) 360.0 Be 130.0 5.3 \* Cd 50 0.66 \* 1.80 150 1.10 \* 3.90 200 2.00 \* 8.60 Cu 50 6.50 \* 9.20

 18.00 200 21.00 \* 34.00 Hg 0.012 \* Ni 50 56.00 + 150 96.00 + 200 160.00 + Pb 50 1.30 \* 34.00 150 3.20 \* 82.00 200 7.7

 200.00 Se 5.0 # Zn 50 180.00 ++ 150 320.00 ++ 200 570.00 ++ 47.00 +

\* Four-day average concentration One-hour average concentration

(Adapted from [42][43][44]).
