Overview
Follow water from source to use
Water quality can change between the incoming source, treatment system, storage tank and point of use. A result from the inlet may not represent water used on the production line.
Chem-Tech reviews the source, treatment, sampling points and process use before confirming the analytical scope. Ingredient water, wash water, ice and cleaning-water questions should be identified separately.
Process-water context
Food-processing water uses and applications
Ingredient, process and cleaning water
Food-production and utility water systems
Physical, chemical and microbiological testing
Testing scope
Build a relevant water test plan
Describe the source, treatment system and intended food or food-contact use.
Select physical, chemical and microbiological parameters against the applicable requirement and process concern.
Agree sampling points, containers and any neutralisation or preservation needs with the laboratory.
Use repeat results alongside maintenance, sanitation and treatment records when reviewing control.
Programme guidance
Connect water results with hygiene evidence
If investigating contamination, compare source and point-of-use results with food, surface or environmental evidence where relevant. A satisfactory water result cannot establish that every food-contact surface or finished product is satisfactory.
Programme guidance
Plan collection before dispatch
Provide the source, outlet identity, collection time, treatment information and intended use.
Confirm sterile portions for microbiology and separate chemistry containers where required.
Agree the quantity, handling, transport and reporting specification before sampling.
Programme guidance
Reference documents
FSSAI regulations, amendments and product standards
FSSAI manuals of methods of analysis
Published laboratory capability
Tests and test methods
The methods below are matched to Chem-Tech's controlled technical test lists and published laboratory capability. The final scope is confirmed for the sample, specification and current laboratory capability.
| Test / parameter | Published test method | Technical purpose | Interpretation / high-low context |
|---|---|---|---|
| Appearance | APHA 2110:2017 / CTP-T-112 | Records the visible condition and colour of the submitted sample. | Unexpected haze, sediment, separation or colour change may indicate contamination, degradation or sample-handling effects; compare with the product reference. |
| Elemental Analysis | ASTM D1976 / CTP-T-125 | Reports selected wear, contaminant, additive or composition-related elements. | Higher or lower values require comparison with formulation, metallurgy, process inputs and trend history; one result alone does not establish the source. |
| Nitrate | APHA 4500-NO3-B / IS 3025 Part 34 | Quantifies the selected dissolved ion or nutrient-related parameter. | A higher or lower result is assessed against the identified water-use requirement and may indicate source, treatment, contamination or process effects. |
| Total Hardness | APHA 2340-B,C / IS 3025 Part 21 | Measures hardness-forming minerals or their contributing ions. | Higher values can increase scaling tendency; very low values may be relevant to corrosivity or treatment control depending on the application. |
| Chloride | APHA 4500-Cl-B,D / IS 3025 Part 32 | Quantifies the selected dissolved ion or nutrient-related parameter. | A higher or lower result is assessed against the identified water-use requirement and may indicate source, treatment, contamination or process effects. |
| Conductivity | APHA 2510-B / IS 3025 Part 14 | Assesses ionic or dissolved-material content in water. | A higher result generally indicates more dissolved ionic material; significance depends on the water source, treatment and intended use. |
| Free Residual Chlorine | APHA 4500-Cl-B / IS 3025 Part 26 | Measures disinfectant residual present at the sampling point. | A low result may indicate insufficient residual, while a high result may affect acceptability or process use; compare with the applicable requirement. |
| pH | APHA 4500-H+-B / IS 3025 Part 11 | Measures acidity or alkalinity of the sample under the selected procedure. | A result above or below the required range may affect treatment control, corrosion, scaling, process suitability or product conformity. |
| Sulphate | APHA 4500-SO4-E / IS 3025 Part 24 | Quantifies the selected dissolved ion or nutrient-related parameter. | A higher or lower result is assessed against the identified water-use requirement and may indicate source, treatment, contamination or process effects. |
| Total Dissolved Solids | APHA 2540-C / IS 3025 Part 16 | Assesses ionic or dissolved-material content in water. | A higher result generally indicates more dissolved ionic material; significance depends on the water source, treatment and intended use. |
| Turbidity | APHA 2130-B / IS 3025 Part 10 | Assesses suspended material or optical cloudiness in water. | A higher result indicates more suspended or light-scattering material and may signal inadequate clarification, contamination or process carryover. |
| Microbial Examination | IS 1622 | Assesses the selected microbiological indicator or organism group. | Detection or a higher count indicates greater microbiological loading; interpretation must follow the applicable water-use requirement and sampling controls. |
| Total and Faecal Coliform | IS 5401 Part 1 | Assesses the selected microbiological indicator or organism group. | Detection or a higher count indicates greater microbiological loading; interpretation must follow the applicable water-use requirement and sampling controls. |
| E. coli | IS 5887 Part 1 | Assesses the selected microbiological indicator or organism group. | Detection or a higher count indicates greater microbiological loading; interpretation must follow the applicable water-use requirement and sampling controls. |
Before dispatch
Sample-submission guidance
- Use a clean, secure and appropriately labelled container; agree sterile portions for microbiology.
- Provide the product name, ingredients, batch or lot, processing state, packaging and storage requirements.
- Share the target market, applicable product specification and testing objective. Confirm quantity, sample units and transport conditions before dispatch.
Technical output
Reporting and interpretation
Review results against the agreed product specification, sampling plan, batch identity and method. A report applies to the submitted sample and agreed scope; it does not certify every batch or guarantee complete food safety.
Explore the evidence
Related testing and practical guidance
Relevant analytical services
Technical reading
Product-specific pathways
Discuss your requirement
Plan your food-testing requirement
Share the product or facility, intended market and the decision you need to make. Our team will review the requirement and confirm the scope.