Water Testing Rates and Guidelines

Aqua Filtration delivers turnkey water treatment solutions is line with the WHO water quality control guidelines.Comprehensive water testing undertaken by a SANS 241-1 Approved Testing Laboratory.

Water Quality Guidelines according to WHO (World Health Organization)

Constituents WHO Parameters Country
Conductivity (μS/cm)
Total Dissolved Solids at (TDS @ 105°C) less than 750
Total Suspended Solids (TSS) 20 to 500
Turbidity (NTU) Must be absent
Odour (TON – Instrumentation) <0.5 (Target < 0.20)
Colour (Pt/Co Units) <5.0 (Target <4.0)
pH <30 (Target <20)
Total Alkalinity 6.50 to 8.50
Total Hardness (TDH as CACO3) 20 to 200
Calcium (as Ca) 10 to 200
Magnesium (as Mg) 5 to 80
Aluminium (Aℓ) - μg/ℓ 3 to 30
Copper (Cu) - μg/ℓ <150 (Target <50)
Iron (Fe) Total - μg/ℓ <200
Iron (Fe-Dissolved) - μg/ℓ <200 (Target <20)
Manganese (Mn) Total - μg/ℓ (Target <20)
Total Heavy Metal Content - μg/ℓ <50(Target <10)
As + Cd + Cr + Hg + Pb + Sb + U <20 (Target = 0)
Sodium (NA) - μg/ℓ 5 to 100 (Aesthetic )
Chloride (C ℓ) - μg/ℓ 5 to 100 (Aesthetic )
Fluoride (F) - μg/ℓ <0.50
Sulphate (SO4) - μg/ℓ <150
Sulphide (R-S-R) - μg/ℓ 2.0 (Target = Zero)
Free and Saline Ammonia (as N) - μg/ℓ <200 (Target <20)
Nitrate (NO3) - μg/ℓ <10 (Target <5.0)
Total Organic Carbon (TOC) - μg/ℓ Eliminated suspended carbon
Dissolved Organic Content (DOC) - μg/ℓ <10.0 (Target < 5.0)

Total Suspended Solids (TSS) Turbidity (NTU)
- NTU after 0.2 – μ lab filtration test
- NTU after H2 O2 & 0.2- μ lab filtration
- NTU after PAC lab filtration test
Colour (Pt/Co Units)
- Colour after 0.2- μ filtration
- Colour after H2 O2 & 0.2- μ lab filtration
- Colour after PAC lab filtration test
UVT [10-mm)
- Saturation Index (LSI @ 22°C)
- Stiff & Davis Index (S & DI @ 22°C)
Oxidation Demand (mg/ℓ - H2O2) x after 0.2- μ filtration

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