| Main Title |
Drinking Water Quality Report, 2004. |
| CORP Author |
District of Columbia Dept. of Environmental Services, Washington. Water and Sewage Utility Administration.;Environmental Protection Agency, Washington, DC. |
| Publisher |
2005 |
| Year Published |
2005 |
| Stock Number |
PB2005-109898 |
| Additional Subjects |
Drinking water ;
Water quality ;
Water supply ;
District of Columbia
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB2005-109898 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
16p |
| Abstract |
The DC Water and Sewer Authority (WASA) distributes water to residences and businesses throughout the District for drinking, fire fighting and other uses. WASA purchases the drinking water from the US Army Corps of Engineers Washington Aqueduct. The Washington Aqueduct (WA) withdraws approximately 180 million gallons of water each day from the Potomac River at the Great Falls and the Little Falls intakes and then treats the water at the two water treatment plants, Dalecarlia and McMillan. The key treatment processes at the WA Dalecarlia and McMillan facilities include sedimentation, filtration, fluoridation, pH adjustment, primary disinfection using free chlorine, secondary disinfection with chloramines through the addition of ammonia to convert the chlorine to choloramine, and finally corrosion control with orthophosphate. This orthophosphate treatment process began system-wide in August 2004 to help reduce the tendency of water to corrode certain metals. Compliance water sample analysis through the end of 2004 indicated that the addition of orthophosphate has significantly reduced the corrosive effects of water on service line pipes and other plumbing fixtures that may contain lead. |
| Supplementary Notes |
Sponsored by Environmental Protection Agency, Washington, DC. |
| Availability Notes |
Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| Category Codes |
48B; 91A |
| NTIS Prices |
PC A03 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
029901440 |
| Origin |
NTIS |
| Type |
CAT |
