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Water Testing Before RO Installation — What to Test, Why & What Results Mean
The single most important step before any RO plant purchase. Which parameters to test, what Lahore bore water typically shows by locality, how to interpret results, and how test data drives system design. With original Aqua Prima field data.
What to Test
Water Parameters to Test Before RO Installation
| Parameter | Why It Matters for RO Design | Pakistan Limit | Action if Elevated |
|---|---|---|---|
| TDS (Total Dissolved Solids) | Determines membrane element count, pump pressure and expected recovery rate | Below 1000 mg/L | Above 500 ppm: RO required. Above 1000 ppm: more membrane elements + stronger pump |
| Hardness (as CaCO3) | Hard water scales the RO membrane — primary cause of early failure in Pakistan | Below 500 mg/L (varies) | Above 300 mg/L: softener or antiscalant required. Lahore bore water typically 400–800 mg/L |
| pH | Affects membrane performance and corrosion of system components | 6.5–8.5 | Outside range: pH correction required before membrane |
| Turbidity (NTU) | Turbid water clogs prefilters rapidly | Below 5 NTU (treated) | Above 5 NTU: multimedia filtration + sediment cartridge required |
| Iron (Fe total) | Iron deposits irreversibly on membrane surface causing fouling | Below 0.3 mg/L | Above 0.3 mg/L: iron removal filtration required before carbon and RO |
| Chlorine (residual) | Chlorine permanently oxidises polyamide RO membranes | Below 0.2 mg/L at membrane | Any detectable chlorine: carbon prefilter essential |
| Arsenic (As) | Above 10 ppb is a drinking-water health concern; present in some Punjab bore water | Below 10 ppb (WHO) | Elevated: RO removes 85–95%; confirm removal with post-RO test |
| Coliform bacteria | Indicates microbiological contamination of source water | Zero CFU/100mL | Any detection: UV post-treatment essential |
| Nitrates (NO3) | Health concern especially for infants; elevated in agricultural areas | Below 50 mg/L (WHO) | RO removes 60–90%; confirm removal rate is adequate |
| Fluoride | Above 1.5 mg/L is a health concern; elevated in some Punjab bore water | Below 1.5 mg/L | RO removes 85–95%; verify post-RO concentration meets limits |
Lahore Field Data
Bore Water Quality Across Lahore Localities — Original Aqua Prima Field Data
This is original Aqua Prima data from source-water analyses conducted across Lahore bore wells. No other Pakistani RO supplier publishes locality-specific water quality data with this level of detail. Aqua Prima is based in Ichhra, Lahore — near Shama Chowk, Baba Azam Chowk, Hamza Hospital, FMH College and the Ferozepur Road commercial corridor.
| Lahore Locality | Typical TDS (ppm) | Typical Hardness (mg/L CaCO3) | Key Concerns | System Design Implication |
|---|---|---|---|---|
| Ichhra (Aqua Prima base) | 900–1800 | 400–800 (very high) | High TDS, very high hardness, microbiological | Multimedia + softener + antiscalant + carbon + RO + UV. Softener essential. |
| Shama Chowk & surrounds | 800–1600 | 350–700 (high to very high) | High TDS, high hardness | Softener + full prefiltration + RO + UV |
| Baba Azam Chowk / Ferozepur Rd | 800–1700 | 350–650 (high) | High TDS, hardness | Softener or antiscalant + prefiltration + RO + UV |
| Samanabad | 700–1600 | 300–600 (high) | High TDS, occasional iron | Softener recommended + prefiltration + RO + UV |
| Rehmanpura | 800–1700 | 400–750 (very high) | Very high hardness | Softener essential + prefiltration + RO + UV |
| Muslim Town | 600–1400 | 300–600 (high) | Variable by depth | Test first; softener likely needed; RO + UV |
| Garden Town | 500–1200 | 250–500 (moderate to high) | Varies significantly by plot | Test first; pretreatment based on results |
| Gulberg | 450–1000 | 200–450 (moderate to high) | Variable; some plots do not need softener | Test first; often simpler pretreatment |
| Model Town | 450–1000 | 200–400 (moderate to high) | Varies significantly by bore depth | Test first; varies by location |
| WASA municipal supply | 200–500 (variable) | 150–350 (moderate) | Chlorine; monsoon turbidity spikes | Carbon prefiltration essential; softener if hardness elevated; RO if TDS elevated |
All ranges are typical observed values from analyses conducted by Aqua Prima. Actual values vary by bore depth, well age and season. A site-specific water test is always required before system design.
From Test to System Design
How Your Water Test Results Drive RO System Specification
📌 High TDS Result
More membrane elements needed. Larger high-pressure pump required. Lower recovery rate at same pressure. Higher electricity consumption. All directly affect system price.
📌 High Hardness Result
Water softener or antiscalant dosing system specified. Without this, membrane scales and fails in 12–18 months instead of 3–4 years. Adds PKR 80,000–200,000 to commercial system cost.
📌 Iron Detected
Iron removal filtration stage specified before carbon and RO. Even moderate iron at 0.5–1.0 mg/L causes significant membrane fouling if it reaches the RO stage.
📌 Coliform Detected
UV post-treatment after the RO membrane becomes essential, not optional. Confirms microbiological risk in source water that RO alone should not be relied upon to address without UV backup.
People Also Ask
FAQs — Water Testing Before RO Installation
Where can I get water tested in Lahore?
How much does a water test cost in Pakistan?
Can I use a TDS meter instead of a full water test?
What is the typical bore water TDS in Ichhra, Lahore?
What if I have already installed an RO system without a water test?
What is the TDS of WASA water in Lahore?
Arrange a Water Test & Free RO Consultation
Aqua Prima conducts source-water analysis as the first step in every RO recommendation. Contact us to arrange testing for your Lahore location.
📍 Ichhra, Lahore | 0327 457 5527