
United Statesでは273軒のホテルがグリーンキー認証を取得しています。いずれも自ら定めたのではない周期で、外部機関の監査を受けています。
Wikimedia CommonsHyatt Regency PhoenixUpscale high-rise hotel in downtown Phoenix, featuring a revolving rooftop restaurant and expansive city views. Offers modern accommodations, a pool a第三者認証取得
Wikimedia CommonsCarlsbad Inn Beach ResortCharming beach resort in Carlsbad, featuring European-inspired architecture and a family-friendly atmosphere. Offers comfortable accommodations, lush 第三者認証取得
Wikimedia CommonsWestin Long Beach, CAModern upscale hotel in downtown Long Beach, offering contemporary guest rooms and professional services. Features an outdoor pool, fitness center, an第三者認証取得
Wikimedia CommonsHyatt Regency Long BeachUpscale hotel overlooking the Pacific Ocean and the Queen Mary. Offers modern accommodations, a pool, and extensive meeting facilities in a prime wate第三者認証取得
Wikimedia CommonsSofitel Los Angeles at Beverly HillsLuxury hotel combining French elegance with Hollywood glamour, located across from the Beverly Center. Features upscale accommodations, an outdoor poo第三者認証取得
Wikimedia CommonsHyatt Regency SacramentoUpscale hotel located across from the California State Capitol and Capitol Park. Features modern accommodations, an outdoor pool, and extensive meetin第三者認証取得
Wikimedia CommonsHyatt Regency La JollaUpscale hotel located in the La Jolla Village area, featuring a sleek design and professional service. Offers refined accommodations, an outdoor pool,第三者認証取得
Wikimedia CommonsManchester Grand Hyatt San DiegoIconic waterfront hotel in downtown San Diego, comprised of two landmark towers. Offers upscale guest rooms with bay views, multiple swimming pools, a第三者認証取得
Wikimedia CommonsFairmont San FranciscoHistoric luxury hotel atop Nob Hill, offering spectacular views of the city and the bay. Features ornate architecture, elegant guest rooms, and world-第三者認証取得
Wikimedia CommonsArgonaut HotelEco-friendly boutique hotel located in Fisherman's Wharf, featuring a nautical-inspired design and historic brick architecture. Offers contemporary ro第三者認証取得
Wikimedia CommonsHyatt Regency Santa ClaraUpscale hotel located adjacent to the Santa Clara Convention Center and California's Great America. Features contemporary accommodations, extensive me第三者認証取得グリーンキーは約100項目の基準でホテルを審査します。必須項目と加点項目があり、水とエネルギーの使用量、廃棄物の分別、洗剤、食材の調達、従業員研修などが対象です。ホテルが申請し、各項目を書面で立証したうえで、現地審査を受けます。認証期間は1年で、維持するには証拠書類の再提出と再審査が必要です。本カタログで最も規模が大きく、ヨーロッパで最もよく見かける認証です。
グリーンキーが評価するのは運営管理であり、CO₂排出量ではありません。プールと空調を備えた大型ホテルが認証を保持しながら、同じ通りの無認証のペンションより宿泊者1人あたりのエネルギー消費が大きい場合もあります。評価されるのは資源を意識的に管理しているかどうかで、環境負荷の絶対量ではありません。また配点は書類の整備を重く見るため、記録の整ったホテルが、目立たないながら実質的に優れたホテルを上回ることもあります。