Overview
The Presumptive Coliform Count Test is a critical microbiological analysis used to detect the presence of coliform bacteria in water samples. Coliform bacteria, commonly found in the environment, serve as indicator organisms for potential contamination by more harmful pathogens. This test involves inoculating water into a nutrient-rich medium and incubating it to observe gas production, which signals bacterial growth. Water safety is paramount for preventing gastrointestinal illnesses, skin infections, and other health issues caused by contaminated water. Regular testing is recommended for drinking water sources, especially after natural disasters or in areas with poor sanitation. DNA Labs India provides this test at an affordable cost of INR 1111.5, with home sample collection available across India. Accurate detection helps in timely interventions to ensure water quality and protect public health. This test is the first step in a comprehensive water quality assessment, often followed by confirmatory tests if needed. Coliform bacteria include both fecal and non-fecal types, and their presence can indicate recent contamination. By identifying these bacteria early, measures can be taken to treat water sources and prevent outbreaks of waterborne diseases. The test is widely used by public health authorities, water suppliers, and individuals to monitor water safety and compliance with standards set by organizations like WHO and ICMR.
To be completed — reclassified from Tests on 2026-11-13.
To determine the presence of coliform bacteria in water, indicating potential contamination and assessing water safety for consumption.
Sample requirements
What to send us
Deliverables & turnaround
What you receive
Turnaround: Report available in 3 days after sample receipt.
Pricing
Transparent pricing
| Option | Turnaround | Price (INR) | Unit |
|---|---|---|---|
| Standard | Report available in 3 days after sample... | ₹1,112 | per sample |
Limitations & precautions
What this service cannot do
Questions customers ask
Frequently asked questions
What is the Presumptive Coliform Count Test?
It is a microbiological test that detects coliform bacteria in water by observing gas production in a nutrient medium, indicating potential contamination.
Why is this test important for water safety?
Coliform bacteria indicate possible presence of harmful pathogens, helping prevent gastrointestinal diseases and ensuring safe drinking water.
How is the water sample collected for this test?
Collect 180 mL of water in three 60 mL sterile screw capped containers, refrigerate, and specify the water source. Home collection is available.
What does a positive result mean?
A positive result indicates the presence of coliform bacteria, suggesting water contamination. Further testing is recommended for confirmation.
What are the symptoms of coliform contamination?
Symptoms may include diarrhea, abdominal cramps, nausea, vomiting, and fever, appearing within hours to days after exposure.
How long does it take to get results?
Results are typically available within 3 days after sample receipt at the laboratory.
Is fasting required for this test?
No, fasting is not required as this is a water test, not a blood test.
What is the cost of the Presumptive Coliform Count Test?
The test costs INR 1111.5 at DNA Labs India, with free home sample collection available in many cities.
How accurate is this test?
The test is a reliable screening method, but positive results should be confirmed with additional tests like MPN or MF for specific identification.
Can this test detect E. coli specifically?
No, it detects coliform bacteria in general. A separate E. coli detection test is needed for specific identification.
What should I do if my water tests positive?
Avoid drinking the water, disinfect or treat the source, and consult a healthcare provider if symptoms occur. Consider further testing.
How often should water be tested for coliforms?
Regular testing is recommended, especially for private sources, after contamination events, or as per regulatory guidelines, typically annually or more frequently.
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