Rule in Response to Naegleria fowleri Amoeba Detections

In light of the the Naegleria fowleri amoeba detections in two different water systems in Louisiana, the State Health Officer finds it necessary to issue an Emergency Rule (ER) to avoid an imminent peril to the public health and safety.  The intent of the ER is to ensure that finished water storage tanks and all points in the distribution system have a disinfectant residual concentration to control the Naegleria fowleri amoeba and to ensure that public water systems are monitoring sites which are representative of the water throughout the distribution system for total coliform and disinfectant residual concentration.

Our goal is to control the amoeba so that Louisiana residents and visitors can feel confident in the safety of the water.

Rule (July 1, 2015 Renewed)

(March 3, 2015, November 3, 2014, July 5, 2014, March 6, 2014, November 6, 2013)

PWS Monitoring Plan Portal

Rule Overview - Quick overview of the Emergency Rule

Rule Presentation (July 2014)

Total Coliform Rule (TCR) and Disinfectant Residual Sample Chart - Indicates the number of monthly bacteriological and monthly disinfectant residual samples required under the emergency rule.  Shows the minimum number of additional sites needed for monthly bacteriological samples and monthly disinfectant residual samples.  This chart does not include information on daily disinfectant residual samples required from points of entry or maximum residence time sites.

Sample Tap Selection - Information on identifying suitable taps for bacteriological sample collection.  Also identifies taps to avoid.

Hach Chlorine Test Kit - Presentation on collecting a low/high range chlorine residual with the Pocket Colorimeter II. Always refer to the manual provided with the Pocket Colorimeter II.  This presentation is for additional clarification.

Implementation Assistance

Rule FAQ

Technical Assistance Providers - The following technical assistance providers are available to help answer questions regarding the emergency rule and provide assistance with submitting your updated TCR and chlorine residual monitoring plans.  To send a request for assistance, click on the providers' name below.

LDH Approved Chlorine Residual Forms

Regional Contact Map


Rule Timeline