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certain that improvements meet Colleyville Development Standards. These standard
practices ensure the delivery of clean, pure water to citizens.

2. Ensure wastewater is managed in a safe and efficient manner for the sake of
maintaining the public health.

3.2 - Ensure regular replacement of water and wastewater facilities

Wastewater collection provides environmentally-friendly conveyance of our
wastewater to the treatment plant operated by the Trinity River Authority. Maintaining
and operating existing infrastructure to reduce the effect of our waste material on
health and the environment is crucial. The Wastewater division takes an aggressive
approach to this responsibility through a proactive monitoring and preventive
maintenance program. These operations include cleaning and inspecting 180 miles of
sewer mains in addition to 2,686 manholes and
three (3) lift stations. The construction of new
public infrastructure is inspected by the
Engineering Division to ensure that it meets all
necessary specifications. This comprehensive
program serves the public by maintaining a safe
and healthy environment.

Performance Measures & Vital Statistics

FY 2020
Performance Measures FY 2015 FY 2016 FY 2017 FY 2018 FY 2019 Target

Percentage of water valves 1% 15% 34% 11% 14% ≥5
exercised
Meter reading accuracy 98% 99% 98% 98% 97% ≥98%

Scheduled wastewater line 91% 94% 93% 96% 98% ≥95%
cleanings completed

FY 2020
Vital Statistics FY 2015 FY 2016 FY 2017 FY 2018 FY 2019
Estimate

Water loss ratio 2.5% 2.5% 3.0% 2.9% N/A 3.0%
Percentage of monthly
water samples testing 98% 100% 100% 100% 100% 100%
negative for coliform
bacteria

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