diff --git a/tools/import_environnement.py b/tools/import_environnement.py
new file mode 100644
index 0000000..de3fd49
--- /dev/null
+++ b/tools/import_environnement.py
@@ -0,0 +1,123 @@
+"""Ajoute colonne environnement sur servers et importe depuis CSV iTop.
+
+Stocke les 7 valeurs iTop verbatim: Développement, Intégration, Pré-Prod,
+Production, Recette, Test, Formation.
+
+Usage:
+    python tools/import_environnement.py <csv1> [<csv2> ...] [--dry-run]
+"""
+import os
+import csv
+import argparse
+from sqlalchemy import create_engine, text
+
+DATABASE_URL = os.getenv("DATABASE_URL_DEMO") or os.getenv("DATABASE_URL") \
+    or "postgresql://patchcenter:PatchCenter2026!@localhost:5432/patchcenter_demo"
+
+ITOP_ENVS = [
+    "Développement", "Intégration", "Pré-Prod",
+    "Production", "Recette", "Test", "Formation",
+]
+
+# Aliases courants -> valeur iTop canonique
+ENV_ALIASES = {
+    "developpement": "Développement",
+    "dev": "Développement",
+    "integration": "Intégration",
+    "int": "Intégration",
+    "preprod": "Pré-Prod",
+    "pre-prod": "Pré-Prod",
+    "pre prod": "Pré-Prod",
+    "prod": "Production",
+    "production": "Production",
+    "recette": "Recette",
+    "rec": "Recette",
+    "test": "Test",
+    "tests": "Test",
+    "formation": "Formation",
+}
+
+
+def norm_env(raw):
+    if not raw:
+        return None
+    s = raw.strip()
+    if not s or s in ("-", "(null)", "workgroup"):
+        return None
+    if s in ITOP_ENVS:
+        return s
+    return ENV_ALIASES.get(s.lower())
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("csv_paths", nargs="+")
+    parser.add_argument("--dry-run", action="store_true")
+    args = parser.parse_args()
+
+    engine = create_engine(DATABASE_URL)
+    print(f"[INFO] DB: {DATABASE_URL.split('@')[-1]}")
+    conn = engine.connect().execution_options(isolation_level="AUTOCOMMIT")
+
+    # 1. Ajoute colonne + CHECK
+    print("[INFO] Ajoute colonne environnement...")
+    if not args.dry_run:
+        conn.execute(text("ALTER TABLE servers ADD COLUMN IF NOT EXISTS environnement varchar(20)"))
+        conn.execute(text("ALTER TABLE servers DROP CONSTRAINT IF EXISTS servers_environnement_check"))
+        allowed_sql = ", ".join(f"'{v}'" for v in ITOP_ENVS)
+        conn.execute(text(
+            f"ALTER TABLE servers ADD CONSTRAINT servers_environnement_check "
+            f"CHECK (environnement IN ({allowed_sql}) OR environnement IS NULL)"
+        ))
+    print(f"[INFO] Envs iTop autorises: {ITOP_ENVS}")
+
+    # 2. Relecture CSV -> update
+    updated = 0
+    unchanged = 0
+    not_found = 0
+    unknown = set()
+
+    for csv_path in args.csv_paths:
+        print(f"\n[INFO] Lecture {csv_path}")
+        with open(csv_path, "r", encoding="utf-8-sig", newline="") as f:
+            sample = f.read(4096)
+            f.seek(0)
+            delim = ";" if sample.count(";") > sample.count(",") else ","
+            reader = csv.DictReader(f, delimiter=delim)
+            rows = list(reader)
+        print(f"[INFO] {len(rows)} lignes (delim={delim!r})")
+
+        for r in rows:
+            hostname = (r.get("Nom") or r.get("Hostname") or "").strip()
+            if not hostname or not any(c.isalpha() for c in hostname):
+                continue
+            raw = (r.get("Environnement") or r.get("Environment") or "").strip()
+            new_env = norm_env(raw)
+            if raw and new_env is None and raw not in ("-", "(null)", "workgroup", ""):
+                unknown.add(raw)
+                continue
+            if new_env is None:
+                continue
+            srv = conn.execute(text("SELECT id, environnement FROM servers WHERE hostname=:h"),
+                               {"h": hostname}).fetchone()
+            if not srv:
+                not_found += 1
+                continue
+            if srv.environnement == new_env:
+                unchanged += 1
+                continue
+            if args.dry_run:
+                print(f"  DRY: {hostname}  {srv.environnement} -> {new_env}")
+            else:
+                conn.execute(text("UPDATE servers SET environnement=:e WHERE id=:sid"),
+                             {"e": new_env, "sid": srv.id})
+            updated += 1
+
+    conn.close()
+    print(f"\n[DONE] Maj: {updated} | Inchanges: {unchanged} | Hors base: {not_found}")
+    if unknown:
+        print(f"[WARN] Valeurs non mappees: {unknown}")
+
+
+if __name__ == "__main__":
+    main()