Water Quality & Material Testing

The ESSD conducts monitoring of water, soil, construction materials such as cement and aggregates and has developed in house facilities and capacities to perform field and laboratory monitoring and assessments in par with the national and international standards along its long standing history as a water quality consultant.

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Major Consultancies

  • Screening Oil releasing sources and the extent of oil pollution in the Pattiwila Marsh and the Pattiwila Canal segment - Kelani Right Bank Water supply project - National Water Supply and Drainage Board
  • Testing of Sea water and Sea sediment at Colombo South Harbour - Hyundai Engineering & Construction Co.Ltd, Colombo Port Expansion Project, Queen Elizabeth Jetty, Sri Lanka Ports Authority
  • Developing a Watershed Management Plan - through Community Water Supply Projects - Ministry of Environmental and Natural Resources
  • Developing a Watershed health assessment program for upper watershed of Kelani river- (Kehelgamu oya Maskeli oya (K_M) watershed - UNDP
  • Developing a watershed management plan for upper watershed of Kukule River- Ministry of Environmental and Natural Resources
  • Monitoring Environmental Quality of the Outer circular Expressway: Water and Air - Weerawila, Mattla, Kandy, Katunayake
  • Testing Soil and water salinity at Moragoda Ela in Galle Strategic Cities Development Project, Ministry of Megapolis & Western Development
  • Providing testing services for the Water Quality Surveillance Project (1988-2010) - National Water Supply & Drainage Board, Ambatale
  • Testing water and sediment – Lunawa Lagoon Improvement Project
  • Testing water and salinity level at Meda Ela, Kandy for Ministry of Strategic Cities Development Project, Ministry of Megapolis & Western Development

Contact

wq coordinatorMs. Madara Dissanayake
Coordinator and Senior Scientist - Land and Water Quality Studies

+94 112 588 946 Ext: 601
This email address is being protected from spambots. You need JavaScript enabled to view it.

Suitability of Drinking Water Compliance to the SLS 614: 2013

  • pH
  • Temperature
  • Turbidity
  • colour
  • Iron
  • Total alkalinity
  • Chloride
  • Free ammonia
  • Nitrate
  • Nitrite
  • Total phosphate
  • Sulphate
  • Free residual chlorine
  • Total hardness
  • Fluoride
  • Oil & grease
  • Total Dissolved solid (TDS)

Including microbiological parameters: Feacal Coliform and Total Coliform

Industrial wastewater Testing (Raw and Treated) – According to the Gazette extraordinary Act 1534/60 (Wastewater Discharge Standards)

  • pH
  • Total Suspended Solid (TSS)
  • Biological Oxygen Demand (BOD)
  • Chemical Oxygen Demand (COD)
  • Total Kjeldahl Nitrogen (TKN)
  • Total Ammonical Nitrogen
  • Oil & Grease

and other standard parameters required for wastewater quality for EPL ( Environmental Protection License) for various industries including Hotels, Food processing, Dairy manufacturing, Rubber manufacturing industry, D/C mills, etc.

Suitability of water for construction purposes - Compliance to the British Standards (BS3148)

  • pH
  • Total Alkalinity
  • Chloride
  • Sulphate
  • Organic Matter
  • Inorganic Matter

General ambient water quality – Compliance to Proposed Ambient Water Quality Standards for Inland Waters - Sri Lanka (2001), CEA

  • Colour
  • TDS
  • pH
  • Temperature
  • Electrical conductivity
  • Turbidity
  • SAR
  • Total Hardness
  • DO
  • BOD
  • COD
  • Nitrate
  • Nitrite
  • Total Ammonia
  • Total Phosphate
  • Chlorides
  • Cyanides
  • Fluorides
  • Sulphates

Solids in Water

  • Inorganic matter
  • Organic matter
  • Total Dissolved Solids (TDS)
  • Total Suspended Solids (TSS)
  • Total Residue
  • Settalable solids
  • Mixed Liquor Suspended Solids (MLSS)
  • Mixed Liquor Volatalic Suspended Solids (MLVSS)
  • Slit Density Index (SDI)

Heavy Metals in water (Detectable at mg/L and µg/L levels)

  • Cadmium as Cd
  • Chromium as Cr
  • Hexavalent Chromium as Cr
  • Copper as Cu
  • Lead as Pb
  • Manganese as Mn
  • Mercury as Hg
  • Alkyl Mercury as Hg
  • Nickel as Ni
  • Zinc as Zn
  • Selenium as Se
  • Boron as B
  • Arsenic
  • Total Iron as Fe

Microbiological Parameters

  • Feacal Coliform
  • Total Coliform
  • Standard Plate count (SPC)
  • Faecal streptococci

Eutrophication Parameters - Carlson Trophic State Index (CTSI)

  • Secchi Depth
  • Chlorophyll a
  • Total Phosphorus
  • Total Nitrogen

Limnological Parameters

  • Primary productivity
  • Algal Biomass
  • Algal Composition

Metallic Ions

  • Calcium as Ca
  • Magnesium as Mg
  • Total Hardness as CaCO3
  • Calcium Hardness as CaCO3
  • Sodium as Na
  • Aluminium as Al
  • Silica as Si
  • Sodium Absorption Ratio (SAR)
  • Active Chlorine in Bleaching Powder
  • RSI
  • LSI

Non-Metallic Ions

  • Total alkalinity as CaCO3
  • Bicarbonate alkalinity as CaCO3
  • Carbonate alkalinity as CaCO3
  • Hydroxide alkalinity as CaCO3
  • Acidity
  • Chloride
  • Total residual chlorine
  • Free residual chlorine
  • Fluoride
  • Sulphide
  • Free Ammonia – Drinking water
  • Albuminoid ammonia
  • Nitrate
  • Nitrite
  • Total Phosphate
  • Dissolved Phosphate
  • Sulphates
  • Stability of Index
  • Langelier Saturation Index (LSI)
  • Ca hardness in mg/l as CaCO3
  • Alkalinity in mg/l as CaCO3
  • Ryznar Stability Index (RSI)

Soil - Compliance to BS 1377

  • pH
  • Chloride
  • Shulphate
  • Organic content
  • LOI (Loss on Ignition)
  • Carbonate
  • Moisture content
  • Oxygen Reduction Potential

Aggregate/Sediment/Sludge

  • pH
  • Calcium
  • Water soluble chloride
  • Acid soluble Chloride
  • Magnesium
  • Sodium
  • Sulphides
  • Total Nitrogen
  • Alkyl Mercury
  • Total Phosphate
  • Water soluble sulphates
  • Acid soluble sulphates
  • Total Sulphur
  • Heavy Metals
  • Total Organic Carbon (TOC)
  • Chemical Oxygen Demand (COD)
  • Biochemical Oxygen Demand (BOD)
  • Oil and Greases
  • Organic Matter
  • Carbonates
  • Silica
  • Ash content
  • Resistivity
  • Oxidation Reduction Potential (ORP)
  • Salinity
  • Moisture content
  • Nitrate
  • Nitrite
  • Hexvalent chromium
  • Alkali reactivity
  • Shell content as calcium carbonate content (quantitative method)

Asbestos – Compliance to the SLS 9: part 2:2001

  • Resistance to acidified water

Suitability of Cement for construction purposes – Compliance to the SLS 107: 2008

  • IR (Insoluble Residue)
  • LOI (Loss on Ignition)
  • SiO2
  • Al2O3
  • CaO
  • MgO
  • Fe2O3
  • SO3
  • Cl-
  • K2O
  • Na2O
  • Lime Saturation Factor
  • Alkali Content
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