Water Quality Comparison Report

This report compares the Pre-RO (Softened) and Post-RO (DI/RO) water analysis results against the **Optimal Chemical Water Qualities for Instrument Reprocessing** standard from the GETINGE document.

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Water Treatment System Performance Report - URGENT

Service Call Reason: Received a call from NMG complaining about the performance of the water treatment system.

Visit Date: October 15, 2025
Lab Sample Date: October 18, 2025

Conclusion: The complaint is validated. The R.O. system fails to produce Critical Water compliant with AAMI ST108 for CSSD sterilizer feed.

1. Pre-RO (Softened) Water Quality Comparison

Comparison of Pre-RO water (Sample W.CH.25.214) against the **Softened** water standard.

Parameter	Unit of Measure	Standard (Softened)	Lab Result (Pre-RO)	Result
pH value	-	6.5-8.5	6.68	PASS
Hardness	mg/L (ppm)	< 10	2	PASS
Conductivity (@ 25°C)	µS/cm	< 500	433	PASS
Chloride (Cl)	mg/L (ppm)	< 60	115	FAIL
Iron	mg/L (ppm)	< 0.3	0.06	PASS
Copper	mg/L (ppm)	< 0.1	< 0.001	PASS
Silica (SiO₂)	mg/L (ppm)	≤ 2	0	PASS
Phosphate (P₂O₅)	mg/L (ppm)	< 10	0.03	PASS

Summary for Pre-RO (Softened) Water:

The **Pre-RO (Softened)** water **FAILS** the standard due to a high **Chloride** concentration (115 mg/L), which exceeds the standard limit (< 60 mg/L). All other tested parameters are within the acceptable limits.

2. Post-RO (DI/RO) Water Quality Comparison

Comparison of Post-RO water (Sample W.CH.25.213) against the **DI/RO** water standard.

Parameter	Unit of Measure	Standard (DI/RO)	Lab Result (Post-RO)	Result
pH value	-	5-7.5	7.14	PASS
Hardness	mg/L (ppm)	≤ 2 (Conversion from ≤ 0.02 mmol/L)	2	PASS
Conductivity (@ 25°C)	µS/cm	≤ 5	51.6	FAIL
Chloride (Cl)	mg/L (ppm)	≤ 0.2	15	FAIL
Iron	mg/L (ppm)	≤ 0.1	0	PASS
Copper	mg/L (ppm)	≤ 0.1	< 0.001	PASS
Silica (SiO₂)	mg/L (ppm)	≤ 1	0	PASS
Phosphate (P₂O₅)	mg/L (ppm)	≤ 0.5	0.05	PASS

Summary for Post-RO (DI/RO) Water:

The **Post-RO (DI/RO)** water **FAILS** the standard for two parameters:

**Conductivity:** The result (51.6 µS/cm) is significantly higher than the standard (≤ 5 µS/cm).
**Chloride:** The result (15 mg/L) is much higher than the standard (≤ 0.2 mg/L).

The Hardness (2 mg/L) passes the converted standard (≤ 2 mg/L).

3. Almamlaka Labs — Aug 2024 Comparison (Your Images)

Note: RO Soft Water = Before RO (Pre‑RO / Softened), RO Hot Water = After RO (Post‑RO).

Parameter	Unit	Before RO (RO Soft Water)	After RO (RO Hot Water)
pH (25°C)	–	7.27	8.25
Total Dissolved Solids (TDS)	mg/L (ppm)	124.9	5.77
Conductivity	µS/cm	276	13.18
Chloride (Cl)	mg/L (ppm)	60	4.5
Sulfate (SO₄)	mg/L (ppm)	1	1
Nitrate‑N (NO₃‑N)	mg/L (ppm)	0.2	0.5
Nitrite‑N (NO₂‑N)	mg/L (ppm)	2	3
Fluoride (F)	mg/L (ppm)	0	0
Total Phosphorus (PO₄)	mg/L (ppm)	0.029	0.022
Calcium as CaCO₃	mg/L (ppm)	4	0
Calcium (Ca)	mg/L (ppm)	1.6	0
Magnesium as CaCO₃	mg/L (ppm)	4	0
Magnesium (Mg)	mg/L (ppm)	0.97	0
Iron (Fe, ferrous)	mg/L (ppm)	0	0.02
Cadmium (Cd)	mg/L (ppm)	<0.00005	<0.00005
Total Hardness	mg/L (ppm)	8	0
Total Chlorine	mg/L (ppm)	0	0.01
Silica (SiO₂)	mg/L (ppm)	0.3	2.9
Odor	–	Odorless	Odorless

Quick Read

RO effect clear: TDS drops from 124.9 → 5.77 mg/L, and conductivity from 276 → 13.18 µS/cm.
Hardness removal: Total hardness 8 → 0 mg/L; Ca/Mg fully removed post‑RO.
Chloride: 60 → 4.5 mg/L — still present after RO but much lower (consistent with membrane selectivity).
Silica: increased to 2.9 mg/L post‑RO in the hot loop; consider checking hot water loop scaling control or measurement context.

4. Multi-Report Comparative Trend Analysis (All Data)

The following tables consolidate all available water quality reports, sorted chronologically from August 2024 to October 2025, to show historical performance trends.

Table 1: Soft Water / Feed Water Trend Comparison

13/8/2024 (R.O SOFT)	13/8/2024 (TANK R.O SOFT)	24/9/2024 (Veolia Feed Water)	23/10/2025 (SOFT)	Line Trend
7.27	7.18	8.02	6.68	Variable
124.9	124.7	164	200	Increasing (↑)
60	65	95	115	Increasing (↑)
1	1	N/R	N/R	Stable (≈)
8	8	0	2	Decreasing (↓)
0	0	0.18	0.06	Variable
276	277	355	433	Increasing (↑)

Table 2: Post-RO Product Water Trend Comparison

13/8/2024 (R.O HOT WATER)	13/8/2024 (TANK R.O WATER)	24/9/2024 (Veolia Hot Water)	23/10/2025 (R.O.01)	Line Trend
8.25	8.4	8.13	7.14	Decreasing (↓)
5.77	5.4	5	23.3	Increasing (↑)
4.5	4.2	3	15	Increasing (↑)
1	1	N/R	N/R	Stable (≈)
0	0	0	2	Increasing (↑)
0.02	0.01	0.03	0	Variable
13.18	12.36	12	51.6	Increasing (↑)

Water Quality Comparison Report for Security Force Makkah