ARALEP

ARALEP (Application de la Recherche à l'Expertise des Pollutions) is a French environmental consulting and analytical laboratory specializing in freshwater ecology, aquatic ecosystem assessment, and water quality monitoring. Founded in 1974 as an association of public laboratories and restructured as a private firm in 2001, ARALEP is headquartered on the Campus LyonTech – La Doua in Villeurbanne (Lyon metropolitan area), one of France's leading science and technology hubs. The organization serves a diverse client base including water authorities, regional and national government bodies, infrastructure project developers, energy operators, and environmental agencies seeking rigorous scientific assessment of freshwater resources and aquatic ecosystems.

ARALEP's laboratory and field capabilities span the full spectrum of biological quality elements defined under European water framework directives. The team applies standardized hydrobiological indices to characterize the ecological status of surface waters: the Diatom Index (IBD — Indice Biologique Diatomées), the Oligochaete Biological Index (IOBS — Indice Oligochètes de Bioindication des Sédiments), the Multimetric Macroinvertebrate Index (I2M2), and the Fish-Based Index (IPR — Indice Poissons Rivières). Taxonomic expertise extends from microalgae and diatoms through benthic macroinvertebrates including crayfish, oligochaetes, and fish communities. This multi-taxon approach enables comprehensive ecological status assessments and multi-year trend monitoring across rivers, streams, and lakes.

The laboratory's analytical capabilities include physical, chemical, and ecotoxicological characterization of freshwater environments. ARALEP tests water and sediment samples for a wide range of micropollutants and contaminants including pesticides, polychlorinated biphenyls (PCB), dioxins and furans, per- and polyfluoroalkyl substances (PFAS), heavy metals, and pharmaceutical residues. These analyses support regulatory compliance monitoring, contamination source tracing, and ecological risk assessment. Hydromorphological parameters — including natural versus regulated flow regimes, sediment transport dynamics, and riparian vegetation (ripisylve) condition — are also assessed, providing an integrated picture of physical habitat quality alongside water chemistry and biology.

A core service area for ARALEP is conducting environmental impact assessments (études d'impacts) and post-construction monitoring for major infrastructure and energy projects. The team has extensive experience evaluating run-of-river and small hydroelectric plants (microcentrales hydroélectriques), large dams, nuclear power stations, linear transport infrastructure (motorways, roads, railway lines, cycle paths), flood-protection embankments, and wastewater treatment plants. ARALEP also assesses hydromorphological restoration works — channel realignment, bank stabilization, and fish-pass installation — evaluating whether interventions achieve their intended ecological objectives. The firm's deep and long-standing engagement with the Rhône River and its tributaries gives it particularly strong institutional knowledge of one of Europe's most hydrologically and ecologically complex river systems.

Beyond impact assessment, ARALEP provides expertise in natural resource management and aquatic habitat conservation. Services include inventories of aquatic biodiversity, territorial water-management contract auditing (bilans de contrats territoriaux, de rivières, de delta), and ecosystem ecology studies for rivers, lakes, and reservoirs. The firm integrates conservation biology into its work, advising on protected species management, population monitoring for threatened fish, and invasive species surveys including non-native crayfish. ARALEP also contributes to applied and fundamental research on the influence of climate change on freshwater ecosystems, drawing on long-term field datasets and close relationships with academic partners on the LyonTech campus.

ARALEP's hydrobiological laboratory holds COFRAC accreditation — France's national accreditation body operating under the ISO/IEC 17025 framework — with accreditation number 1-6360 granted in February 2018. The accredited scope covers hydrobiological analyses including macroinvertebrate community analysis using combined sampling methods (MPCE — Méthode des Prélèvements Combinés en Eaux courantes) and diatom analysis (IBD). COFRAC accreditation under ISO/IEC 17025 confirms that ARALEP's analytical methods, quality management systems, staff competencies, and equipment calibration have been independently audited and verified against international standards for laboratory testing competence, giving clients confidence in the regulatory defensibility of results.

With over fifty years of uninterrupted practice in freshwater science and premises at the CEI 1 building on Campus LyonTech – La Doua (66 Boulevard Niels Bohr, CS 52132, 69603 Villeurbanne Cedex) — a campus shared with INSA Lyon and multiple leading research institutions — ARALEP combines academic scientific rigor with practical applied expertise. Its multidisciplinary team of field biologists, laboratory analysts, hydrologists, and project managers handles assignments from initial site characterization through regulatory permit support and long-term ecological monitoring programs. Clients requiring water and sediment quality assessments, environmental impact studies, biodiversity inventories, or contamination analyses covering PFAS, heavy metals, pesticides, PCBs, and pharmaceutical compounds will find in ARALEP a well-accredited, scientifically credible partner with the territorial knowledge and methodological depth to deliver defensible, standard-compliant results.