Scientific expeditions in 1996 and 2006 described the lagoon and surrounding waters of Diego Garcia, along with the rest of the Chagos Archipelago, as "exceptionally unpolluted" and "pristine".
Expedicións científicas en 1996 e 2006 describiron a lagoa e as augas circundantes de Diego García, xunto co resto do Arquipélago Chagos, como "excepcionalmente non contaminada" e "virxe".