SANS 241: 2015

Physical and Aesthetic Determinands

Determinand	Units	Operational Limit	Aesthetic Limit	Chronic Health	Acute Health
Total dissolved solids	mg/l	—	1200	—	—
Turbidity	NTU	1	5	—	—
pH at 25	pH units	≥ 5 to ≤ 9.7	—	—	—

Chemical and Macro Determinands

Determinand	Units	Operational Limit	Aesthetic Limit	Chronic Health	Acute Health
Free chlorine as Cl2	mg/l	—	—	5	—
Monochloramine	mg/l	—	—	3	—
Nitrate as N	mg/l	—	—	—	11
Nitrite as N	mg/l	—	—	—	0.9
Combined Nitrate + nitrite	mg/l	—	—	—	1
Sulphate as SO4	mg/l	—	250	—	500
Flouride as F	mg/l	—	—	1.5	—
Ammonia as N	mg/l	—	1.5	—	—
Chloride as Cl	mg/l	—	300	—	—
Sodium as Na	mg/l	—	200	—	—
Zinc as Zn	mg/l	—	5	—	—

Chemical and Micro Determinands

Determinand	Units	Operational Limit	Aesthetic Limit	Chronic Health	Acute Health
Antimony as Sb	µg/l	—	—	20	—
Arsenic as As	µg/l	—	—	10	—
Barium as Ba	µg/l	—	—	700	—
Boron as B	µg/l	—	—	2400	—
Cadmium as Cd	µg/l	—	—	3	—
Total Chromium as Cr	µg/l	—	—	50	—
Copper as Cu	µg/l	—	—	2000	—
Cyanide (recoverable) as CN	µg/l	—	—	200	—
Iron as Fe	µg/l	—	300	2000	—
Lead as Pb	µg/l	—	—	10	—
Manganese as Mn	µg/l	—	100	400	—
Mercury as Hg	µg/l	—	—	6	—
Nickel as Ni	µg/l	—	—	70	—
Selenium as Se	µg/l	—	—	40	—
Uranium as U	µg/l	—	—	30	—
Aluminium as Al	µg/l	300	—	—	—

Chemical and Organic Determinands

Determinand	Units	Operational Limit	Aesthetic Limit	Chronic Health	Acute Health
Total organic Carbon	mg/l	—	—	10	—
Chloroform	µg/l	—	—	300	—
Bromoform	µg/l	—	—	100	—
Dibromochloromethane	µg/l	—	—	100	—
Bromodichloromethane	µg/l	—	—	60	—
Combined thrihalomethane	µg/l	—	—	—	—
Total microcystin	µg/l	—	—	1	—
Phenols	µg/l	—	—	10	—