Cruise Lines
| Cruise Line | Sewage Treatment | Air Pollution Reduction | Water Quality/Scrubber Use | Transparency | Final Grade | Slug |
|---|---|---|---|---|---|---|
| Hurtigruten | C | A | N/A | A | B+ | hurtigruten |
| Disney Cruise Line | C | C+ | N/A | A | B | disney-cruise-line |
| Royal Caribbean Int’l | C | D- | F | D | D- | royal-caribbean-intl |
| Celebrity Cruises | C | D+ | F | D | D- | celebrity-cruises |
| Carnival Cruise Lines | D- | D | F | F | F | carnival-cruise-lines |
| Holland America Line | C | C+ | F | F | D- | holland-america-line |
| Princess Cruises | C | C+ | F | F | D- | princess-cruises |
| Silversea Cruises | C- | F | F | D | D- | silversea-cruises |
| Regent Seven Seas Cruises | C | D+ | N/A | A | C+ | regent-seven-seas-cruises |
| Norwegian Cruise Lines | C | D | F | A | D+ | norwegian-cruise-lines |
| Cunard | C | F | F | F | F | cunard-cruise-line |
| Costa Cruises | F | D | F | F | F | costa-cruises |
| P&O Cruises | D | F | F | F | F | po-cruises |
| P&O Australia | C | C- | F | A | C- | po-australia |
| Oceania Cruises | C | C- | F | A | C- | oceania-cruises |
| Seabourn Cruise Line | C | F | F | F | F | seabourn-cruise-line |
| MSC Cruises | D | D+ | F | A | D+ | msc-cruises |
| AIDA Cruises | C | C | F | F | D- | aida-cruises |
| Virgin Voyages | C | D+ | F | A | C- | virgin-voyages |
| Viking Cruises | C | C+ | F | A | C | viking |
| HX (Hurtigruten Expeditions) | C | A | N/A | A | B+ | hurtigruten-expeditions |