Comparison of Water Sample Results (CH-R-25-00399) and RO Membrane Usage Limits [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start] [cite_start]
CHEMICAL & PHYSICAL ANALYSIS
Parameter UnitLab Result (PDF) [cite: 12] RO Membrane Usage Limit (Image) Compliance Status (vs. RO Limit)
Temperature $\Delta^{\circ}C$21.1 [cite: 12] N/A N/A
Potential Hydrogen - **pH** value8.09 [cite: 12] **3.6–9.5** (during operation) COMPLIANT
Total Dissolved Solids - TDS $mg/l$62 [cite: 12] N/A N/A
Electrical Conductivity - EC $\mu c$95 [cite: 12] N/A N/A
Turbidity NTU0.3 [cite: 12] N/A N/A
Total Suspended Solid - TSS $mg/l$<1.0 [cite: 12] N/A N/A
Sample Odour Odorless [cite: 12] N/A N/A
Sample Color TCU5.0 [cite: 12] N/A N/A
Total Hardness - $CaCO_{3}$ $mg/l$15 [cite: 12] N/A N/A
Ca-Hardness - $CaCO_{3}$ $mg/l$10 [cite: 12] N/A N/A
Mg-Hardness - $CaCO_{3}$ $mg/l$4.9 [cite: 12] N/A N/A
Total Alkalinity - $CaCO_{3}$ $mg/l$10 [cite: 12] N/A N/A
Bicarbonate - $HCO_{3}$ $mg/l$11.2 [cite: 12] N/A N/A
Carbonate - $CO_{3}$ $mg/l$Nil [cite: 12] N/A N/A
Hydrogen Sulphide - $H_{2}S$ $mg/l$<0.01 [cite: 12] N/A N/A
Chloride - Cl $mg/l$30 [cite: 12] N/A N/A
Sulphate - $SO_{4}$ $mg/l$6.0 [cite: 12] N/A N/A
Calcium - Ca $mg/l$4.0 [cite: 12] N/A N/A
Magnesium - Mg $mg/l$1.2 [cite: 12] N/A N/A
Nitrate - $NO_{3}$ $mg/l$0.4 [cite: 12] N/A N/A
Nitrite - $NO_{2}$ $mg/l$<0.1 [cite: 12] N/A N/A
Sodium - Na $mg/l$11 [cite: 12] N/A N/A
Potassium - K $mg/l$0.3 [cite: 12] N/A N/A
Ammonia Nitrogen - $NH_{3}-N$ $mg/l$<0.01 [cite: 12] N/A N/A
**Free Chlorine - $Cl_{2}$** $mg/l$<0.01 [cite: 12] **not detectable\*** **NON-COMPLIANT**
**Silica - $SiO_{2}$** $mg/l$<1.0 [cite: 12] **10** COMPLIANT
Zinc - Zn $mg/l$0.02 [cite: 12] N/A N/A
Aluminium - Al $mg/l$<0.01 [cite: 12] N/A N/A
**Total Iron - Fe** $mg/l$0.01 [cite: 12] **0.2** COMPLIANT
**Manganese - Mn** $mg/l$0.01 [cite: 12] **0.05** COMPLIANT
BACTERIOLOGICAL EXAMINATIONS
Parameter UnitLab Result (PDF) [cite: 13] RO Membrane Usage Limit (Image) Compliance Status (vs. RO Limit)
Total Plate Count - TPCB $cfu/ml$NS [cite: 13] N/A N/A
Fecal Coliform Bacteria - FCB $cfu/100ml$Negative [cite: 13] N/A N/A
Legionella Bacteria $mpn/ml$NS [cite: 13] N/A N/A
Yeast & Mold Bacteria $mpn/100ml$Nil [cite: 13] N/A N/A
Total Coliform - TCB $cfu/100ml$Negative [cite: 13] N/A N/A
Escherichia Coli Bacteria $cfu/100ml$Negative [cite: 13] N/A N/A
Intestinal Worm Eggs $mpn/ml$Nil [cite: 13] N/A N/A
Pseudomonas Aeruginosa $cfu/100ml$Nil [cite: 13] N/A N/A

[cite_start]**Key Compliance Note:** The single non-compliant parameter is **Free Chlorine ($Cl_{2}$)**[cite: 12]. The lab result of **<0.01 mg/l** does not meet the RO membrane requirement of **"not detectable"**. Free Chlorine is listed as an oxidant that must be free from the feed water to avoid damaging the membrane.