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Chapter:

358F PDFTitle:TOLO HARBOUR AND CHANNEL WATER CONTROL ZONE STATEMENT OF WATER QUALITY OBJECTIVES FOR WATERCOURSESGazette Number:
Schedule:1Heading:Version Date:30/06/1997

Water Quality Objective for Watercourses
Subzone
A. AESTHETIC APPEARANCE
    Waste discharges shall not cause waters of the subzone to contain substances that-
    (a) settle to form objectionable deposits;
    (b) float as debris, scum, oil or other matter to form nuisances;
    (c) produce objectionable colour, odour, taste or turbidity;
    (d) injure or are toxic or produce adverse physiological responses in humans, animals or plants; or
    (e) are conducive to undesirable aquatic life or a nuisance to aquatic life.
All watercourses
B. BACTERIA
    Waste discharges shall not cause the level of Escherichia coli to exceed 1000 per 100 ml in waters of the subzone, levels to be calculated as a running median of the most recent 5 consecutive samples taken at intervals of between 7 and 21 days (or 14 and 42 days).
(a) SM(A)
(b) SM(C)
(c) SM(D)
(d) SM(E)
(e) SM(H)
(f) SM(I)
(g) TP(B)
(h) TP(C)
(i) other water-
    courses
    Waste discharges shall not cause the level of Escherichia coli to exceed 0 per 100 ml in waters of the subzone, levels to be calculated as a running median of the most recent 5 consecutive samples taken at intervals of between 7 and 21 days (or 14 and 42 days).
(a) SM(B)
(b) SM(F)
(c) SM(G)
(d) LT(C)
(e) LT(D)
(f) TP(A)
C. COLOUR
    Waste discharges shall not cause the colour of waters of the subzone to exceed 50 Hazen units at any time.
(a) SM(A)
(b) SM(C)
(c) SM(D)
(d) SM(E)
(e) SM(H)
(f) SM(I)
(g) TP(B)
(h) TP(C)
(i) other water-
    courses
    Waste discharges shall not cause the colour of waters of the subzone to exceed 30 Hazen units at any time.
(a) SM(B)
(b) SM(F)
(c) SM(G)
(d) LT(C)
(e) LT(D)
(f) TP(A)
D. pH
    Waste discharges shall not cause the pH of waters of the subzone to exceed the range of 6.0 to 9.0 at any time.
(a) SM(D)
(b) SM(E)
(c) SM(I)
(d) other water-
    courses
    Waste discharges shall not cause the pH of waters of the subzone to exceed the range of 6.5 to 8.5 at any time.
(a) SM(A)
(b) SM(B)
(c) SM(C)
(d) SM(F)
(e) SM(G)
(f) SM(H)
(g) LT(C)
(h) LT(D)
(i) TP(A)
(j) TP(B)
(k) TP(C)
E. TEMPERATUREAll watercourse
    Waste discharges shall not cause the natural daily temperature range in waters of the subzone to be extended by greater than +/- 2.0 degrees Celsius at any location or time.
F. SUSPENDED SOLIDS
    Waste discharges shall not cause the annual median of suspended solids in waters of the subzone to exceed 25 milligrams per litre.
(a) SM(D)
(b) SM(E)
(c) SM(I)
(d) other water-
    courses
    Waste discharges shall not cause the annual median of suspended solids in waters of the subzone to exceed 20 milligrams per litre.
(a) SM(A)
(b) SM(B)
(c) SM(C)
(d) SM(F)
(e) SM(G)
(f) SM(H)
(g) LT(C)
(h) LT(D)
(i) TP(A)
(j) TP(B)
(k) TP(C)
G. DISSOLVED OXYGEN
    Waste discharges shall not cause the level of dissolved oxygen in waters of the subzone to be less than 4 milligrams per litre or 40% saturation (at 15 degrees Celsius) at any time.
All watercourses
H. 5 DAYS BIOCHEMICAL OXYGEN DEMAND
    Waste discharges shall not cause the 5 days biochemical oxygen demand in waters of the subzone to exceed 5 milligrams per litre at any time.
(a) SM(A)
(b) SM(C)
(c) SM(D)
(d) SM(E)
(e) SM(H)
(f) SM(I)
(g) TP(B)
(h) TP(C)
(i) other water-
    courses
    Waste discharges shall not cause the 5 days biochemical oxygen demand in waters of the subzone to exceed 3 milligrams per litre at any time
(a) SM(B)
(b) SM(F)
(c) SM(G)
(d) LT(C)
(e) LT(D)
(f) TP(A)
I. CHEMICAL OXYGEN DEMAND
    Waste discharges shall not cause the chemical oxygen demand in waters of the subzone to exceed 30 milligrams per litre at any time.
(a) SM(A)
(b) SM(C)
(c) SM(D)
(d) SM(E)
(e) SM(H)
(f) SM(I)
(g) TP(B)
(h) TP(C)
(i) other water-
    courses
    Waste discharges shall not cause the chemical oxygen demand in waters of the subzone to exceed 15 milligrams per litre at any time.
(a) SM(B)
(b) SM(F)
(c) SM(G)
(d) LT(C)
(e) LT(D)
(f) TP(A)
J. AMMONIACAL NITROGEN
    Waste discharges shall not cause the ammoniacal nitrogen in waters of the subzone to exceed 0.5 milligrams per litre at any time.
All watercourses
K. TOXICANTSAll watercourses
    Waste discharges shall not cause the toxicants in waters of the subzone to attain such a level as to produce significant toxic effects in humans, fish or any other aquatic organism, with due regard to biologically cumulative effects in food chains and to toxicant inter-actions with each other.

(Enacted 1988)