TapGraded
C

CITY OF COCKRELL HILL

Dallas, TX · 3,855 served

CITY OF COCKRELL HILL serves 3,855 people in Dallas, TX. It has 0 health-based violations in the last 5 years. TapGraded gives this system a C.

Score breakdown

Health-based violations (5y)

0

Monitoring violations (5y)

1

Currently unaddressed

0

Overall score

78/100

Violation history (last 5 years)

2025
Health-based Monitoring / reporting

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Lead (Lead and Copper Rule)

EPA's current lead action level is 15 ppb (dropping to 10 ppb in 2027 under the Lead and Copper Rule Improvements).

90th-percentile lead sample 0 ppb
0 ppb EPA action level: 15 ppb

PFAS (UCMR5 occurrence data)

PFNA (not detected) 0 ppt
0 ppt EPA MCL: 10 ppt
PFHxS 4.2 ppt
0 ppt EPA MCL: 10 ppt
PFOA 5.1 ppt over limit
0 ppt EPA MCL: 4 ppt
PFOS 4.1 ppt over limit
0 ppt EPA MCL: 4 ppt
HFPO-DA (not detected) 0 ppt
0 ppt EPA MCL: 10 ppt

System details

System type
Community water system
Water source
Surface water purchased from another system
Ownership
Local government
Service connections
1,097

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Frequently asked questions

Is Dallas, TX tap water safe to drink?

CITY OF COCKRELL HILL has 0 health-based violations in the last 5 years. TapGraded gives this system a C.

Does CITY OF COCKRELL HILL have lead in its water?

The most recent 90th-percentile lead sample is 0 ppb, versus the EPA action level of 15 ppb.

Has PFAS been detected in CITY OF COCKRELL HILL's water?

Yes — PFAS was detected at or above the EPA MCL for 2 of the tracked analytes.

Source: EPA SDWIS/ECHO · Data as of 2026Q2