THE PUBLIC WATER SYSTEM, OWNED AND OPERATED BY THE DEPARTMENT OF THE NAVY AND WASHINGTON SUBURBAN SANITARY COMMISSION, FAILED TO CORRECT, SIGNIFICANT DEFICIENCIES THAT POSE A POTENTIAL THREAT TO HUMAN HEALTH, AND EXPANDED THE SYSTEM WITHOUT NOTIFICATION TO EPA. THE ORDER REQUIRES THE RESPONDENTS TO, AMONG OTHER ACTIVITIES, SUBMIT AND EXECUTE A PLAN TO CORRECT SIGNIFICANT DEFICIENCIES IDENTIFIED IN A SANTIARY SURVEY PERFORMED AT THE BASE. FURTHER, THE ORDER REQUIRES TEH PWS TO PUBLIC-NOTICE THE VIOLATIONS TO ITS CUSTOMERS, AND TO PROVIDE QUARTERLY PROGRESS REPORTS TO EPA.