Is Houston tap water safe to drink?

Use caution filtration recommended

Houston's water has significant quality concerns. We strongly recommend a certified water filter.

59/100

Purity Score

Issues Found

8 GPG

Hardness

Detected

PFAS

4 Issues Detected in Houston

PFAS (Forever Chemicals) Detected

PFAS are man-made chemicals that do not break down and accumulate in the body.

PFAS details for Houston

Moderately Hard Water (8 GPG)

Hardness above 7 GPG can cause minor scale buildup.

Hardness data for Houston

Moderate Chlorine Level

Chlorine within EPA limits but may affect taste.

Chlorine info for Houston

Arsenic Approaching Limit (0.5 mg/L)

EPA limit is 0.010 mg/L.

Arsenic info for Houston

Fix Your Water — See Recommended Filters

Texas

770,017,700,277,003 · Lake Houston and Lake Livingston

Houston Water Quality Report: PFAS Detected

Elevated Risk Updated March 2026 2.3M residents

See Best Filters for Houston

Purity Score

Recent testing detected PFAS in Houston tap water. Below you'll find contaminant data, an overall purity score, and matched filter recommendations based on Houston's specific water profile.

Water Quality Data

PFAS

Detected (3.8 ppt)

PFAS detected. RO filter recommended.

PFAS in Houston

Lead

Not detected (4.2 ppb)

Hard water in Houston

Chlorine

Medium

Affects taste and skin. Carbon filter removes it.

Learn about chlorine

TDS

Unknown

High TDS (>500 ppm) may affect taste.

Contaminant Levels

PFAS

3.8 ppt

Lead

4.2 ppb

Nitrate

1.8 mg/L

Arsenic

0.5 mg/L

Hardness

8 gpg

Health Insights

1
With a hardness of 8 GPG, Houston residents may notice white scale on faucets. Hard water increases maintenance costs.
2
PFAS have been identified in Houston's water at 3.8 parts per trillion. A reverse osmosis system is the most reliable home treatment.
3
Chlorine levels may affect the taste of Houston's tap water. A carbon filter improves flavor.

Score

59 /100

Poor

"Good" threshold (70)

Houston tap water is sourced from Lake Houston and Lake Livingston and treated by City of Houston Public Works. PFAS forever chemicals have been detected. Water hardness is hard at 8.0 GPG which may cause scale buildup. Overall purity score: 59/100 (Poor). Updated for 2026.

Fix Your Water

Best filters matched to Houston's 4 issues.

See Filters

MATCHED TO HOUSTON'S WATER DATA

Best Water Filters for Houston, TX (2026)

Matched to PFAS Detected, Hard Water (8 GPG), Moderate Chlorine in Houston.

PFAS Detected Hard Water (8 GPG) Moderate Chlorine

Best Overall #1 for Houston

Clearly Filtered Water Pitcher

Pitcher Filter

$80-95

Why this fits Houston

Removes 99%+ of PFAS detected in Houston's water
Eliminates chlorine taste and odor from Houston's water
NSF/ANSI 42 + NSF/ANSI 53 + NSF/ANSI 401 certified

Pros & Cons +

No installation fill and pour

Removes 365+ contaminants including PFAS

Small capacity 2-3 people

Filter replacements every 4 months

Fix Your Water — Check Price

Best for PFAS

Waterdrop G3P800 Tankless RO

Tankless Reverse Osmosis

$380-450

Why this fits Houston

Removes 99%+ of PFAS detected in Houston's water
Eliminates chlorine taste and odor from Houston's water
NSF/ANSI 58 + NSF 372 certified

Pros & Cons +

No tank saves cabinet space

800 GPD fast flow rate

Higher upfront cost

Filter replacements are proprietary

Check Price on Amazon

Best for Taste

APEC Water Systems ROES-50

Under-Sink Reverse Osmosis

$195-220

Why this fits Houston

Removes 99%+ of PFAS detected in Houston's water
Eliminates chlorine taste and odor from Houston's water
NSF/ANSI 58 certified

Pros & Cons +

5-stage filtration removes 99%+ of contaminants

Long-lasting filters (6-12 month replacement)

Requires under-sink installation

Wastes some water during filtration

Check Price on Amazon

Best Value

Waterdrop 10UA Under-Sink Filter

Under-Sink Carbon Filter

$40-60

Why this fits Houston

Eliminates chlorine taste and odor from Houston's water
NSF/ANSI 42 certified
Budget-friendly at $40-60

Pros & Cons +

Very affordable

Easy DIY install no plumber

Does not remove PFAS or hardness

Single point of use only

Check Price on Amazon

As an Amazon Associate, PurityMap may earn from qualifying purchases. Based on latest Houston water data.

Full Filter Comparison for Houston

Know exactly what's in YOUR tap

City data shows averages. Your home may differ.

Test Your Water — $25-30

About Houston's Water

PFAS Water Contamination: What Houston Residents Should Know

PFAS have been detected in Houston's water supply at 3.8 parts per trillion. Health agencies including the EPA have set limits on certain PFAS compounds in drinking water due to concerns about long-term exposure. While municipal treatment reduces many contaminants, standard water treatment does not fully remove PFAS. Point-of-use reverse osmosis filtration is the most effective home solution confirmed to remove PFAS at the 99%+ level.

Houston Hard Water: Effects on Your Home

Hard water conditions in Houston (8 GPG) can leave white mineral deposits on fixtures, reduce soap lather, and gradually damage water-using appliances. Water heaters are particularly vulnerable: scale insulates the heating element, raising energy costs and reducing lifespan. A water softener exchanging calcium and magnesium for sodium eliminates scale formation throughout the home. For households concerned about sodium in drinking water, pairing a softener with an RO system at the kitchen tap is the standard approach.

Explore Houston Water Data

Houston Water FAQ

Is Houston TX tap water safe to drink in 2026?

Houston tap water meets EPA federal drinking water standards and scores 59/100 (Poor) on PurityMap for 2026. PFAS forever chemicals have been detected at 3.8 ppt. An NSF-certified filter is strongly recommended. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.

Does Houston TX use chlorine or chloramine for disinfection?

Houston uses chloramine as the primary disinfectant with a residual level of 1.7 ppm. Chloramine is harder to remove than free chlorine and requires a catalytic carbon or reverse osmosis filter. Standard Brita-style pitchers will NOT remove chloramine.

How hard is Houston TX water and what is the TDS level?

Houston water hardness is 8.0 grains per gallon (hard) with a TDS of 290 ppm (fair). This level causes noticeable scale buildup in water heaters kettles and dishwashers. A water softener is recommended to protect plumbing and reduce soap usage.

Has PFAS been found in Houston TX drinking water?

Yes. PFAS forever chemicals have been detected in Houston water at approximately 3.8 ppt according to EPA UCMR5 monitoring data. A reverse osmosis or NSF P473-certified filter is the most effective residential solution.

What is the best water filter for Houston?

Based on Houston's water profile, we recommend the Clearly Filtered Water Pitcher. Houston: PFAS detected or elevated lead risk. Reverse osmosis is the only residential technology proven to reduce both below detection limits. TDS will also drop significantly.

Nearby Reports

DallasTexas — 64/100 College StationTexas — 69/100 LubbockTexas — 71/100 San AntonioTexas — 73/100 AmarilloTexas — 73/100 MidlandTexas — 73/100

All Texas cities

Explore Water Quality by State

Compare across all 50 US states

View All States

Data Sources

EPA SDWIS
EWG Tap Water Database
City of Houston Public Works CCR
USGS monitoring data

PurityMap compiles public data. Updated March 2026.

Link copied!