PWSID
TX0570004
State
Texas
City
DALLAS
Population served
1,356,479
Primary source
Surface water
Score history
▼ 19 points — the score moved from 100 to 81 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Jan 2024). Levels in parts per trillion (ppt).
PFOS
Perfluorooctanesulfonic acid
4.4 ppt
limit 4 ppt
PFOA
Perfluorooctanoic acid
4.1 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
3.4 ppt
limit 10 ppt
PFBA
10 ppt
limit —
PFPeA
6.1 ppt
limit —
PFHxA
5.3 ppt
limit —
PFBS
4.2 ppt
limit —
PFHpA
3.3 ppt
limit —
Violations & enforcement
2
Violations on record
0
Unaddressed
0
Health-based
3
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Jun 2008. Official EPA record →
Recent enforcement actions
- State action · SOX Jun 2008
- State action · SIA Apr 2008
- State action · SIE Apr 2008
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Nitrate
2 stations · latest Aug 2023
Fluoride
2 stations · latest Dec 2023
Arsenic
2 stations · latest Dec 2023
Atrazine
2 stations · latest Jan 2024
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system TX0570004 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.