- EPA's UCMR 5 testing looked for 30 contaminants here and found 6.
- PFBA (a PFAS): found in 2 of 4 samples, average 5.5 ppt, highest 14.7 ppt (EPA UCMR 5 testing, Jan 2023–Oct 2023)
- PFPeA (a PFAS): found in 2 of 4 samples, average 3.6 ppt, highest 9 ppt (EPA UCMR 5 testing, Jan 2023–Oct 2023)
- PFHxA (a PFAS): found in 2 of 4 samples, average 3.5 ppt, highest 8.5 ppt (EPA UCMR 5 testing, Jan 2023–Oct 2023)
- PFOS (a PFAS): found in 2 of 4 samples, average 2.2 ppt, highest 4.7 ppt (EPA UCMR 5 testing, Jan 2023–Oct 2023)
- PFBS (a PFAS): found in 2 of 4 samples, average 2 ppt, highest 4.5 ppt (EPA UCMR 5 testing, Jan 2023–Oct 2023)
- PFHxS (a PFAS): found in 1 of 4 samples, average 0.90 ppt, highest 3.6 ppt (EPA UCMR 5 testing, Jan 2023–Oct 2023)
- Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2024–Dec 31, 2026). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Public EPA test results
Can you drink Deer Park tap water? What EPA records show
EPA TX1010007 · serves Harris County, TX · about 34,495 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
City of Deer Park (EPA TX1010007)
EPA data as of October 14, 2026. For Deer Park's main utility, City of Deer Park: We found no health-based violations in EPA's records for this system (TX1010007) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 6. This is public data, not a test of your tap.
What EPA records show for City of Deer Park, as of October 14, 2026
We found no health-based violations in EPA's records for this system (TX1010007) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for City of Deer Park (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2024–Dec 31, 2026). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 6.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does City of Deer Park use chloramine?
EPA treatment records (state-reported) list chloramines for City of Deer Park. EPA record