1. Harris County Municipal Utility District - #341
Water System Maintenance
Informational Meeting and Q&A
January 19, 2017

2. System Maintenance Why are we doing it
County surface water is treated with chlorine and ammonia creating Chloramines and over time nitrates build up in the system
Water quality tests indicate recurring pockets of nitrates in the system
Periodic water flushing performed to reduce buildup
Before nitrate concentrations increase further TNG recommends a chlorine flush to rebalance system
MUD Board made decision to proceed with flush while nitrate concentrations are low
Note: MUD 370 which services LOEN successfully completed a similar flush just before Thanksgiving
Nitrates (NO3) are an essential source of nitrogen (N) for plants. When nitrogen fertilizers are used to enrich soils, nitrates may be carried by rain, irrigation and other surface waters through the soil into ground water. Human and animal wastes can also contribute to nitrate contamination of ground water. Wikipdia

3. System Maintenance How will this be accomplished
Additional chlorine will be injected into the system at the water plant
Currently the water is treated with a 2.5 to 3.5 ppm of free chlorine
The target treatment level is 4.0 ppm of free chlorine
Note: commercial pool chlorine concentration range from ppm
Starting from the water plant connection point and working through LOE, drain points will be opened to flush the lines
Closure of the drainage valve is based on the water running clear and the residual chlorine content reaching the target level
Note: MUD 371 this took less than 10 mins per valve
The discharged water will enter the storm water system
TNG has prepared a daily plan of flushing identifying areas (see map)

4. System Maintenance When will this happen
Flush - Monday 2/6 to Wednesday 2/8
Spot check verification - Thursday 2/9 & Friday 2/10
3-6 technicians working on-site throughout week
Progress announced at the end of each day
website posting on home page
Have Christi post updates on home page…simplifies search, and no signup necessary

5. Flush Schedule How will this happen INSERT COLOR CODED MAP by TNG
Water Plant
How will this happen
INSERT COLOR CODED MAP by TNG
Tue: 2/7/17
Thur: 2/9/17
Mon: 2/6/17
Thur: 2/9/17
Wed: 2/8/17
Fri: 2/10/17
Legend
Flush date:
Spot check date:
Drain Location

6. System Maintenance What You Should Do THE WATER is SAFE to DRINK
Run your cold water 1-2 minutes before using or drinking
Run your washing machine through one cycle before washing clothes
Unplug your ice machine or empty untouched ice tray after this period. Buy ice if needed
Clean water softener filters each day or turn the softener off
THE WATER is SAFE to DRINK
You may experience colored water and water with an odor
Running water before use will help to clear potential colored water and odor from your water service line.
Questions or concerns please contact:
TNG Utility (281)

7. System Maintenance Notifications LOE Newsletter Article – Done
Notice in TNG water bill – Done
Informational Meeting and Q&A – Current
LOE Website - Home Page
LOE Blast – 1/27, 2/3
Hang Tags on all doors – 2/1
Ongoing status LOE website

8. System Maintenance
Question & Answer Session