ZIP Code 77084
High RiskPFAS above EPA limits detected
2 compounds exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.
67
PFAS Detected
2
Above EPA Limits
15
Water Systems
243%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 243% of limit
Detected: 9.70 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 153% of limit
Detected: 15.30 ppt
What this means for you
One or more PFAS compounds were measured above the EPA's enforceable drinking water limit at a utility serving ZIP 77084. The EPA set these limits because long-term exposure at higher concentrations is associated with health effects including immune suppression, thyroid changes, and cancer risk increases. Standard pitcher filters (Brita, PUR) are not certified to remove PFAS. The most reliable at-home options are under-sink reverse osmosis systems or activated carbon block filters with an NSF/ANSI 58 certification specifically listing PFOA/PFOS reduction. Your water utility is required to bring levels into compliance by 2029 — filtering at the tap is the practical interim step if you'd like additional protection now.
CITY OF HOUSTON, TX
TX1010013 ModerateWater Type
Groundwater
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 33900.00ppt | No federal limit | — | Unregulated |
6:2 FTS 6:2 Fluorotelomer sulfonic acid | 42.60ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 10.60ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 6.70ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 5.10ppt | No federal limit | — | Unregulated |
NORTHAMPTON MUD
TX1010337 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 37700.00ppt | No federal limit | — | Unregulated |
HARRIS COUNTY UTILITY DISTRICT 6
TX1010501 Low LevelWater Type
Surface Water
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFBA Perfluorobutanoic acid | 9.10ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 5.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.70ppt | No federal limit | — | Unregulated |
HARRIS COUNTY MUD 102
TX1010503 ModerateWater Type
MX
PFAS Detected
6
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 3.60ppt | 36% of limit
| 10 ppt | Below limit |
lithium | 26700.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 9.20ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 8.60ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 8.50ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.60ppt | No federal limit | — | Unregulated |
JACKRABBIT ROAD PUD
TX1010538 ModerateWater Type
Surface Water
PFAS Detected
6
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 3.40ppt | 34% of limit
| 10 ppt | Below limit |
lithium | 20000.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 8.10ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 7.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.60ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.00ppt | No federal limit | — | Unregulated |
WESTLAKE MUD 1
TX1010635 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 37300.00ppt | No federal limit | — | Unregulated |
SPENCER ROAD PUD
TX1010654 High RiskWater Type
Surface Water
PFAS Detected
8
Above MCL
2
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 9.70ppt | 243% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 15.30ppt | 153% of limit
| 10 ppt | ⚠ Exceeds MCL |
lithium | 18800.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 27.20ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 10.70ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 9.20ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 4.80ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.20ppt | No federal limit | — | Unregulated |
ADDICKS UTILITY DISTRICT
TX1011019 ModerateWater Type
Surface Water
PFAS Detected
6
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 3.30ppt | 33% of limit
| 10 ppt | Below limit |
lithium | 11200.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 7.40ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 6.80ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 6.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.70ppt | No federal limit | — | Unregulated |
LANGHAM CREEK UTILITY DISTRICT
TX1011249 ModerateWater Type
MX
PFAS Detected
6
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 3.30ppt | 33% of limit
| 10 ppt | Below limit |
lithium | 33100.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 9.10ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 7.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 6.30ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.70ppt | No federal limit | — | Unregulated |
BARKER CYPRESS MUD
TX1011613 ModerateWater Type
Surface Water
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 11100.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 6.80ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 5.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.70ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.00ppt | No federal limit | — | Unregulated |
KATY ISD MAYDE CREEK SCHOOL COMPLEX
TX1011728 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 20500.00ppt | No federal limit | — | Unregulated |
HARRIS COUNTY MUD 183
TX1011824 ModerateWater Type
Surface Water
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 3.10ppt | 31% of limit
| 10 ppt | Below limit |
lithium | 14200.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 6.60ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 6.50ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.90ppt | No federal limit | — | Unregulated |
HARRIS COUNTY MUD 185
TX1011914 ModerateWater Type
Surface Water
PFAS Detected
7
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 3.40ppt | 34% of limit
| 10 ppt | Below limit |
lithium | 11100.00ppt | No federal limit | — | Unregulated |
6:2 FTS 6:2 Fluorotelomer sulfonic acid | 13.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 9.60ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 8.20ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 7.10ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.30ppt | No federal limit | — | Unregulated |
HARRIS COUNTY MUD 238
TX1012361 Low LevelWater Type
Surface Water
PFAS Detected
4
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 20700.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 8.30ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 5.80ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.80ppt | No federal limit | — | Unregulated |
HARRIS COUNTY MUD 276
TX1012942 Low LevelWater Type
Surface Water
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFBA Perfluorobutanoic acid | 7.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 5.20ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.90ppt | No federal limit | — | Unregulated |
Note: ZIP code 77084 is served by 15 separate water utilities.
Results above show data for each system independently.
About this data
Source
EPA UCMR 5 (Unregulated Contaminant Monitoring Rule, 5th cycle)
Data released
January 2026
Sampling period
January 2023 – December 2025
Systems tested
~10,000 public water systems serving > 25 people
Water systems (PWSID)
TX1010013, TX1010337, TX1010501, TX1010503, TX1010538, TX1010635, TX1010654, TX1011019, TX1011249, TX1011613, TX1011728, TX1011824, TX1011914, TX1012361, TX1012942
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor, not zero
Values shown are the highest single-sample concentration measured at entry points to the distribution system. Results reflect water quality at the treatment plant — aging pipes, building plumbing, and on-site storage can affect what actually reaches your tap.