Hamburg city environment and hygiene institute that runs interlaboratory tests for environmental and drinking-water laboratories, including chemical drinking-water ring tests operated jointly with AQS Baden-Württemberg and cross-state water ring tests (LÜRV).
Trinkwasser-Ringversuche chemische Analytik (with AQS Baden-Württemberg)
26/1 TW/LÜRV S12 Organochlor-Insektizide in gering belastetem Wasser
| Scheme | Testing fields | Sample type | Analytes | Rounds/yr | Link |
|---|---|---|---|---|---|
| Trinkwasser-Ringversuche chemische Analytik (with AQS Baden-Württemberg) |
| Drinking water | Anions, trace elements, cations, general parameters, other inorganics, pesticides and other organic groups (11 ring tests rotating) | — | Scheme page for Trinkwasser-Ringversuche chemische Analytik (with AQS Baden-Württemberg) (opens in a new tab) |
| 26/1 TW/LÜRV S12 Organochlor-Insektizide in gering belastetem Wasser |
| Surface, ground and drinking water | HCH isomers, DDT, DDD, aldrin, dieldrin, trifluralin, HCB, heptachlor and epoxides | — | Scheme page for 26/1 TW/LÜRV S12 Organochlor-Insektizide in gering belastetem Wasser (opens in a new tab) |
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Compiled from Institut für Hygiene und Umwelt Hamburg (HU) - Ringversuche's own published information or sent in by the provider, and reviewed by EqasOnline. Check scheme details, fees and dates with the provider before you enrol. 2 schemes listed here.
Last updated 1 Nov 2026.
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Other providers listing schemes in the same testing fields, those in Germany first.
Stuttgart, Germany
Schemes: Ringversuche Trinkwasser – A 1 Anionen (Drinking water)Ringversuche Trinkwasser – O 2 LHKW/Benzol (Drinking water)Ringversuche Trinkwasser (A 1–A 5 anorganische, O 1–O 5 organische Parameter) (Drinking water)
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Accreditation self-declared (DAkkS)Kempten, Germany
Schemes: Food and feed – chemical-physical testing (Dairy, animal products, beverages, fruit and vegetables, cereals, fats and oils, cocoa, infant formula, animal feed)Food and feed – immunological, molecular biological and microbiological testingFood and feed – organoleptic (sensory) testing
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Accreditation self-declared (DAkkS)Recklinghausen, Germany
Schemes: Trinkwasser-Ringversuche (drinking water, chemical parameters) (Drinking water)Mikrobiologische Ringversuche (Legionella and colony count in cooling water) (Cooling water)Länderübergreifende Wasser-Ringversuche (LÜRV) (Wastewater and other aqueous media)
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Accreditation self-declared (DAkkS)Berlin, GermanyInternational participants
Schemes: BAM-Ringversuch Altlasten (contaminated sites) (Contaminated soils or sediments)BAM-Ringversuch zur Altholzanalytik (waste wood) (Wood)CEQAT-DGHS interlaboratory comparisons (physical hazards of dangerous goods and hazardous substances)
3 schemes
Aurich, GermanyInternational participants
Schemes: Mikrobiologischer Ringversuch: E. coli / coliforme Bakterien, Enterokokken, Koloniezahlen (Drinking water)Mikrobiologischer Ringversuch: Legionella, Pseudomonas aeruginosa, Clostridium perfringens (Drinking water)Ringversuch hygienisch-chemische Parameter in Trinkwasser (3 Teilringversuche) (Drinking water)
3 schemes
Accreditation self-declared (DAkkS)Speyer, GermanyInternational participants
Schemes: VDLUFA EU Düngemittel-Ringtest (EU Fertiliser Ring Test) (Fertilisers)VDLUFA Futtermittel-Enquete (feed survey) (Feed (3 samples))Ringversuch Mykotoxine (mycotoxins in feed) (Feed)
5 schemes