• Water analyses are part of the monitoring of water intended for human consumption ("drinking water"), surface water (lakes and rivers), groundwater or sea water. 
• Tap water is monitored for microbiological, physico-chemical and radiological parameters to ensure that it complies with regulatory quality requirements and poses no risk to consumer health.
• In the case of a wastewater treatment plant, inlet (raw water) and outlet (treated water) analyses help to monitor discharges and the operation of the facilities. If the performance of the waste water treatment plants is not sufficient to eliminate all the pollutants, some of these substances are likely to be discharged (see water pollution).

It should be noted that depending on the type of water, water must comply with various quality criteria: physico-chemical parameters, organoleptic parameters (taste and odour for drinking water), microbiological parameters, parameters relating to undesirable substances and toxic substances.

As part of your accreditation to ISO 17025 and/or approval, your laboratory must meet the requirements of :

• accreditation related to water sampling, physico-chemical and microbiological testing
• approvals issued by the Ministry of Health to carry out sampling and analysis for water health control purposes 
• approvals issued by the Ministry for the Environment to carry out analyses in the field of water and aquatic environments

You must ensure the validity of your results and monitor your performance by comparing it with the results of other laboratories.
As an urban wastewater treatment plant, you check your performance as part of your self-monitoring system.

Your laboratory is likely to be interested in the following categories of proficiency tests:

• Water samplig and in situ measurements
• Chemistry PTs in water:
  • Base parameters and indicators in waters
  • Metals in waters
  • Indexes in waters
  • Organic pollutants in clean waters
  • Organic pollutants in waste waters
• Microbiology in waters
• Waters for medical use
• Biology and ecotoxicology

"Participating in round-robin tests in Germany and in France, I am very satisfied with AGLAE’s on-line results’ submission, short delays to receive detailed personalized reports and Excel summaries including my lab’s performance during the year. The statistical processing performed by AGLAE helps me in my daily life at the laboratory to compare the various analytical techniques. Besides, AGLAE is open to technical discussions and really pays attention to participants’ needs, adding parameters or even creating new tests to better meet our expectations." 

Alfred Ewen, Head of department "drinking water laboratory”, MVV Netze GmbH, Mannheim (Germany)

"We have been working with AGLAE since 2012. The PT program is one of the most complete you could find, besides, I would like to remark the excellent personal attention they give us."

Núria Bodi Majó, Badalona’s Laboratory Quality Manager, Tecnoambiente (Spain)

They are carried out as part of self-monitoring or regulatory controls. They enable part of the requirements to be covered:

• accreditation scopes related to physico-chemical analyses in waters (see Accreditation No. 1-1664) 
• approvals issued by Ministries of Health to carry out sampling and analysis for water quality control purposes 
• approvals issued by Ministries for the Environment to carry out analyses in the field of water and aquatic environments

• fresh water, public supply water, spring water, natural mineral water
• waste water entering or leaving urban treatment plants
• saline and brackish water

Depending on the type of water, laboratories measure various metals, including heavy metals such as mercury, lead, cadmium, chromium, copper, arsenic and nickel, which are usually present in the environment in trace form.

Depending on the methods used for metal analysis, differences in results are observed. AGLAE studies them and presents them in the test reports. These observations help laboratories to better interpret their analysis results.
AGLAE has published several studies on metals based on test observations:

• Differences between methods for metals in clean water 
• Comparison of ICP/MS and other techniques for iron, titanium and mercury
• Comparison of mineralisation methods for iron and tin in wastewater

AGLAE proficiency tests are used not only to assess laboratory performance, but also to check their estimated measurement uncertainties and estimate the repeatability and reproducibility of their measurements.
AGLAE provides customised reports to laboratories, enabling them to focus on possible improvements to their analyses.

AGLAE also offers to improve the quality of your measurements:

• water sampling and in situ measurements

See all AGLAE's tests

They are carried out as part of self-monitoring or regulatory controls. They enable part of the requirements to be covered:

• accreditation scopes related to physico-chemical analyses in waters (see Accreditation No. 1-1664) 
• approvals issued by Ministries of Health to carry out sampling and analysis for water quality control purposes 
• approvals issued by Ministries for the Environment to carry out analyses in the field of water and aquatic environments

• fresh water, public supply water, spring water, natural mineral water, surface water (lake, canal, pond)
• wastewater entering or leaving urban wastewater treatment plants

Various indices are measured by the laboratories in this series of tests:

• total cyanides
• phenol
• anionic surfactant
• total hydrocarbons C10-C40
• volatile hydrocarbons C5-C9

Depending on the methods used to analyse the indexes, differences in results are observed. AGLAE studies them and presents them in the test reports. These observations help laboratories to better interpret their analysis results.
AGLAE has published a study on indexes resulting from tests observations: Anionic surfactant index, comparison of global analysis methods (spectrophotometry with or without flux).
AGLAE's proficiency tests are used not only to assess laboratory performance, but also to check their estimated measurement uncertainties and to assess the repeatability and reproducibility of their measurements.
AGLAE provides personalised reports to laboratories, enabling them to focus on possible improvements to their analyses.

AGLAE also offers to improve the quality of your measurements:

• water sampling and in situ measurements
• basic parameters and indicators in water

Check all AGLAE's tests