Does Allen comply with DBP limits? How do we know tests are accurate?

TCEQ requires that DBP tests be conducted by the State, not the City, by a state-selected contractor to ensure integrity of the testing. Samples for DBP in Allen are drawn at eight sample sights each quarter, totaling 32 sample sites per year, in accordance with Texas Commission on Environmental Quality (TCEQ) procedures. The contractor submits samples to a state-certified laboratory for analysis.  City staff does not touch these samples. In order to view results, City staff must go to the same Texas Drinking Water Watch website available to the general public. Every test result from every sample point for the last two years is available on the site.

To use the website you need to know Allen’s Water System Number (TX0430025), water system name (City of Allen) and county (Collin). After entering this information, click on our water system number. You can view DBP results by clicking on either the LRAA (TTHM HAA5) or the TTHM HAA5 Summary Tabs.

The City’s annual Water Quality Report summarizes TTHM and HAA testing results compared to the EPA/TCEQ standard.

Show All Answers

1. What is temporary change in disinfectant (TCD)?
2. What is a "chlorine burn" and is it different than "chlorine maintenance" or "TCD"?
3. Can you reduce the amount of chlorine in the water so the taste and odor isn’t as noticeable and disinfection byproducts (DBPs) are reduced?
4. What are disinfection by-products (DBP)?
5. Does Allen comply with DBP limits? How do we know tests are accurate?
6. Does our water system contain any lead pipes?
7. How does Allen regulate levels of lead and copper?
8. Where can I learn more about lead and copper in drinking water?
9. Where does the list of regulated contaminants and allowed concentration limits or ranges come from?
10. How are new contaminants selected for the list of contaminants and how are the limits established?
11. What are the guidelines on commercial flushing?
12. How can I influence water quality and safety?