Mumbai receives some of the highest annual rainfall in India, yet safe drinking water remains a concern. Water supplied by the municipal network is treated before distribution, but by the time it reaches homes, offices and commercial buildings, it has often travelled through kilometres of ageing pipelines, underground storage tanks and overhead tanks. Leaks, cross-connections, old plumbing and poorly maintained water tanks can all affect water quality.

In Navi Mumbai and surrounding areas, many residential societies and industries also rely on borewells or tanker water, creating additional challenges such as high TDS, hardness, iron and nitrate contamination.

Whether you're a homeowner, facility manager or business owner, these are the 10 most important drinking water tests to help ensure your water is safe.

1. Microbiological Testing (E. coli & Total Coliforms)

This is arguably the most important drinking water test.

The presence of E. coli indicates faecal contamination, while Total Coliforms suggest that bacteria have entered the water supply through damaged pipelines, contaminated storage tanks or poor plumbing hygiene.

In Mumbai, contamination often occurs after the water leaves the treatment plant, making microbiological testing essential.

Why it matters:

• Detects harmful bacteria
• Confirms drinking water safety
• Identifies contamination from storage tanks and pipelines
• Helps prevent waterborne diseases

2. pH Testing

pH measures whether water is acidic or alkaline.

Water with an unsuitable pH can corrode plumbing, damage fixtures and alter the taste of drinking water. It also affects how efficiently disinfectants such as chlorine work.

Why it matters:

• Prevents pipe corrosion
• Protects plumbing systems
• Improves water taste
• Supports effective disinfection

3. Total Dissolved Solids (TDS)

TDS measures the amount of dissolved minerals and salts in water.

In many parts of Navi Mumbai where borewell water is used, TDS levels can be significantly higher than municipal water supplies.

High TDS may affect:

• Taste
• Scaling in appliances
• RO system performance
• Overall water quality

4. Turbidity

Turbidity measures how cloudy the water is.

Cloudy water often contains suspended particles such as silt, rust, clay or organic matter. These particles can also reduce the effectiveness of chlorine by shielding microorganisms.

Why it matters:

• Indicates suspended contamination
• Helps evaluate filtration performance
• Supports effective disinfection
• Improves water appearance

5. Total Hardness

Hardness is caused mainly by dissolved calcium and magnesium.

Hard water is common in groundwater and borewell supplies around Mumbai and Navi Mumbai.

High hardness can cause:

• Scaling inside pipes
• Reduced water heater efficiency
• Soap wastage
• White deposits on taps and fittings

6. Heavy Metals

Although uncommon in treated municipal water, heavy metals can enter drinking water through ageing pipelines, plumbing systems or environmental contamination.

Common metals tested include:

• Lead
• Arsenic
• Cadmium
• Mercury
• Iron

Routine testing is especially recommended for older residential buildings and industrial areas.

7. Nitrates

Nitrates are commonly associated with groundwater contamination from sewage, septic systems and agricultural runoff.

While Mumbai's municipal supply generally maintains low nitrate levels, borewell water should always be tested before being used for drinking.

High nitrate levels can present health risks, particularly for infants.

8. Fluoride

Fluoride occurs naturally in groundwater.

Both low and excessive fluoride concentrations can create long-term health concerns, making routine monitoring important wherever groundwater is used.

Testing helps determine whether treatment is required.

9. Residual Chlorine

Municipal water is disinfected using chlorine.

Residual chlorine testing confirms that sufficient disinfectant remains in the water to control bacterial growth while ensuring it is not present in excessive amounts that could affect taste or odour.

It is particularly useful after storage in overhead tanks.

10. Chlorides & Sulphates

These naturally occurring salts influence the taste and corrosiveness of water.

Elevated concentrations may indicate contamination or changes in water quality, particularly where groundwater or tanker water is used.

Monitoring these parameters helps assess the overall chemical quality of drinking water.

Why Water Testing Matters in Mumbai

Mumbai's water treatment infrastructure is among the best in the country, but the greatest risks often occur between the treatment plant and your tap.

Common issues include:

• Ageing water pipelines
• Poorly maintained overhead tanks
• Underground storage tank contamination
• Cross-connections during repairs
• Borewell water quality variations
• Tanker water of unknown quality

Regular testing identifies these problems early, allowing corrective action before they affect the health of occupants or disrupt business operations.

Why Choose Atlas Lab?

Atlas Lab is an NABL-accredited laboratory providing comprehensive drinking water testing across Mumbai and Navi Mumbai. We test residential, commercial and industrial water supplies using recognised analytical methods and deliver fast, reliable reports.

Our services include:

• Chemical water analysis
• Microbiological testing
• Heavy metal analysis
• Borewell and municipal water testing
• RO water testing
• Fast sample collection across Mumbai and Navi Mumbai
• Reports within 3 working days for most routine drinking water tests

Whether you're testing water for your home, housing society, office, restaurant or industrial facility, regular water analysis provides peace of mind that your drinking water is safe, compliant and fit for everyday use.

Phone :+91 9324631646
WhatsApp : +91 9324631646‬
Email : contact@atlaslab.in