Microbiological Analysis
Legionella
We carry out legionella testing in accordance with our UKAS accreditation and to British Standard specifications. Our laboratory uses the minimum detection limit of <100cfu/l that has been recomended by the Approved Code of Practice L8/2001.
A ten-day test is carried out on the sample from the site and the client is informed immediately if positive results occur and are advised on a suitable strategy to solve the problem.
Bacteriological Analysis
Please see our current UKAS schedule for a list of currently accredited tests.
- Coliforms & E.coli
- Total Viable Count
- 2 day @ 37°C
- 3 day @ 22°C
- Clostridia
- Enterococci
- Fungi
- Mould & Yeast
- Nitrite Reducing Bacteria
- Pseudomonas species/ Positive
- Staphylococcus aureus
- Sulphate Reducing Bacteria
Chemical Analysis
N.B Our UKAS Schedule of Accreditation does not cover Chemical Analysis.
Oxygen & Carbon
- Biochemical Oxygen Demand (BOD)
- Chemical Oxygen Demand (COD)
Nitrogen
- Ammonical Nitrogen
- Kjeldahl Nitrogen
- Organic Nitrogen
- Total Oxidised Nitrogen
Anions
- Chloride
- Orthophosphate (expressed as P)
- Sulphate
- Total Phosphate
Physical Tests
- Dissolved Oxygen (by probe)
- Electrical Conductivity
- Nitrate
- Nitrite
- pH
- Settleable Solids
- Settled Sludge Volume
- Suspended Solids
- Total Dissolved Solids
- Total Solids
- Volatile Solids
Miscellaneous Tests
- Alkalinity & Acidity
- Anionic Detergent
- Carbonate & Non Carbonate Hardness
- Chlorine Free Residual
- Chlorine Total Residual
- Colour & Clarity
- Fats, Oils & Greases (Gravimetric)
- Fats, Oils & Greases (IR)
- Hydrocarbon Mineral Oil (by IR)
- Taste & Odor (Qualitative)
- Total Hardness
- Turbidity
Closed System
- Chloride
- Conductivity
- Glycol
- Molybdate
- Nitrite
- pH
- Sulphate
- Sulphite
- Suspended Solids
- TDS (Meter)
- Total Alkalinity
- Total Soluble Iron
Risk Assessment
A risk assessment is carried out so that systems can be identified that are at risk from colonisation by legionella or have potential for creating water droplets that may come in contact with persons inside or outside the building. Risks can be assessed of the normal operation of plant or water systems and any abnormal or unusual circumstances noted.
The risk of Legionella in hot and cold water services can be reduced by:
- Avoiding water temperature between 20°C and 30°C
- Avoiding water stagnation
- Avoiding use of materials that could promote growth of bacteria
- Keeping the system clean
- Using a water treatment scheme if appropriate