States › Texas › Harris County

Harris County, TX Water Quality

Water quality data for 34 public water systems serving Harris County, Texas — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 34 water systems · 37 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Harris County Earns a A

Harris County: 37 communities across 34 water systems. 94.6% have no open violations.

  • Median lead where detected: 2.69 ppb
  • 25 communities with a lead detection, 12 reporting none detected
  • 2 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 94.6% of communities have no open violations
2.69 ppb
Median Lead Level
County-wide, 90th percentile
34
Water Systems
Active CWS & NTNCWS
94%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Pasadena
    3.72 ppb
    No federal limits exceeded on record
    A
  • La Porte
    2.35 ppb
    No federal limits exceeded on record
    A
  • Katy
    2.69 ppb
    No federal limits exceeded on record
    A
  • Channelview
    Not detected
    No federal limits exceeded on record
    A
  • Bellaire
    1.20 ppb
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Galena Park
    1.70 ppb
    1 violation currently open
    C
  • Jersey Village
    4.60 ppb
    1 violation currently open
    C
  • Houston
    5.00 ppb
    3 health-based violations since 2015
    B
  • Baytown
    2.10 ppb
    PFAS above the limit at 1 of 2 sampling points
    B
  • Webster
    2.46 ppb
    PFAS above the limit at 1 of 1 sampling points
    B
County Lead Level — Median 2.69 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.69 ppb — 17.9% of the federal action level
Systems by Lead Level
Under 5 ppb
24
5 – 10 ppb
1
No Data
12

All Cities in Harris County

Houston 5.00 ppb B
Pasadena 3.72 ppb A
Baytown 2.10 ppb B
Deer Park Not detected A
La Porte 2.35 ppb A
Katy 2.69 ppb A
Channelview Not detected A
Bellaire 1.20 ppb A
Humble 3.85 ppb A
South Houston 1.20 ppb A
West University Place 2.90 ppb A
Cloverleaf 1.00 ppb A
Seabrook Not detected A
Spring 3.25 ppb A
Tomball 1.63 ppb A
Galena Park 1.70 ppb C
Webster 2.46 ppb B
Jacinto City Not detected A
Atascocita 2.10 ppb A
Jersey Village 4.60 ppb C
Highlands Not detected A
Nassau Bay Not detected A
Barrett Not detected A
Spring Valley Village Not detected A
Hunters Creek Village 4.10 ppb A
Bunker Hill Village 1.20 ppb B
Piney Point Village 4.10 ppb A
El Lago 3.65 ppb B
Crosby 0.84 ppb B
Hedwig Village 4.10 ppb A
Aldine Not detected B
Southside Place Not detected B
Shoreacres Not detected B
Sheldon 2.55 ppb B
Hilshire Village 4.07 ppb B
Morgan's Point Not detected B
Taylor Lake Village 3.65 ppb B
Showing 37 cities
No active violations Active violations

About Harris County Drinking Water

Harris County is served by 34 water systems covering 37 communities. 95% have no open violations.

Of the communities reporting lead results, 25 recorded a detection, with a median of 2.69 ppb — 18% of the federal action level. 12 reported none detected, which means below the laboratory limit rather than an absence of lead.

2 of 37 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Harris County tap water safe to drink?▼
95% of communities have no open violation. 2 of 37 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Harris County?▼
Among communities with a detection the median is 2.69 ppb, 18% of the 15 ppb action level. 12 reported none detected and 0 reported no result.
How many water systems serve Harris County?▼
34 community water systems serve 37 communities here.
← Back to Texas water quality overview