Persistent Pockets of Low Chlorine Residual in New York City's Drinking Water Distribution System: A Case Study. Issue 10 (4th October 2019)

• Record Type: Journal Article
• Authors: Savane, Ousmane Sy; Khan, Eakalak; Freud, Salome; Murphy, Amy; Tesfargiogis, Kibre; Murray, Virginia
• Is Part Of: Journal ‐ American Water Works Association. Volume 111:Issue 10(2019)
• Page Start: 40
• Page End: 50
• Publication Date: 2019-10-04
• Subjects: Residual Chlorine -- New York -- Distribution Systems -- Rehabilitation -- Pipes -- Ductile Iron Pipe; Water-supply -- United States -- Periodicals; Water-supply engineering -- United States -- Periodicals; 363.61097305
• DOI: 10.1002/awwa.1379
• Languages: English
• ISSNs: 0003-150X

Abstract

Key Takeaways: Pockets of low chlorine residual have been found in New York City's water distribution system, with fluctuating water demand resulting from the seasonal operation of local institutions. Variations of the chlorine residual profiles in one such pocket were found through both field and laboratory investigations. Once the cast‐iron pipe was replaced with ductile‐iron pipe in the study area, an acceptable chlorine residual was usually maintained; when low chlorine residuals were observed, low‐velocity flushing remediated the situation.