PFAS in Houston, TX Drinking Water
PFAS have been detected in Houston, TX drinking water at approximately 3.8 ppt. The EPA maximum contaminant level for PFOA and PFOS is 4 ppt individually.
PFAS Contamination Snapshot
Houston, TXPFAS & Water Quality Data
Houston, TX| Contaminant | Detected Level | EPA Limit (MCL) | Status |
|---|---|---|---|
| PFAS (Total) | 3.8 ppt | 4.0 ppt (PFOA/PFOS) | Detected |
| PFOA | 3.8 ppt* | 4.0 ppt | Present |
| PFOS | 3.8 ppt* | 4.0 ppt | Present |
| GenX (HFPO-DA) | Possibly present | 10 ppt | Check Report |
| PFAS Risk Level | Elevated | Moderate — PFAS Detected | |
| Purity Score | 59/100 | — | Poor |
| Water Source | Lake Houston and Lake Livingston | — | |
Total PFAS measurement shown. Individual PFOA/PFOS concentrations may differ — consult your utility's Consumer Confidence Report for compound-level data.
EPA PFAS Standards
What they mean for HoustonFinal PFAS Rule (Current)
In April 2024, the EPA finalized the first-ever legally enforceable Maximum Contaminant Levels for PFAS in drinking water:
Compliance Monitoring Begins
City of Houston Public Works in Houston will be required to test and report results.
Full Compliance Deadline
All public water systems must meet the MCLs or install treatment to reduce PFAS below legal limits.
EPA finalized enforceable PFAS limits in 2024: 4 ppt for PFOA, 4 ppt for PFOS individually.
While below the EPA MCL of 4.0 ppt, PFAS has been detected. Emerging research suggests health effects may occur below regulatory limits with long-term exposure.
Health Risks of PFAS Exposure
Houston residents should be awarePFAS exposure is linked to: kidney and testicular cancer, thyroid disease, immune system suppression, reproductive issues, liver damage, and developmental effects in children.
Cancer Risk
PFOA is classified as a possible human carcinogen. Studies link PFAS exposure to kidney cancer, testicular cancer, and elevated risks of bladder and liver cancers.
Thyroid Disease
PFAS disrupt thyroid hormone regulation. Exposure is associated with hypothyroidism, thyroid cancer, and metabolic dysfunction — particularly dangerous during pregnancy.
Immune System
PFAS reduce vaccine antibody response and suppress immune function. Children with higher PFAS blood levels show weaker responses to routine vaccinations.
Reproductive & Developmental
Linked to decreased fertility, pregnancy-induced hypertension, preeclampsia, low birth weight, and developmental delays in children exposed in utero.
Liver & Kidney Damage
PFAS accumulate in the liver and kidneys. Chronic exposure is associated with elevated cholesterol, liver enzyme changes, and impaired kidney function.
Cardiovascular Effects
Strong evidence links PFAS to elevated total and LDL cholesterol levels, increasing risk of heart disease, atherosclerosis, and stroke over time.
What Are PFAS?
How they get into Houston's waterPFAS (per- and polyfluoroalkyl substances) are a group of over 14,000 synthetic chemicals used since the 1940s. Their carbon-fluorine bond — one of the strongest in chemistry — makes them virtually indestructible in nature, earning the name "forever chemicals."
Industrial Discharge
Factories manufacturing or using PFAS release contaminated wastewater into rivers and groundwater. Houston's lake houston and lake livingston source may be affected.
Firefighting Foam (AFFF)
PFAS-containing aqueous film-forming foam used at military bases, airports, and fire training facilities seeps into soil and groundwater.
Landfill Leachate
Consumer products containing PFAS break down in landfills. PFAS-laden leachate can contaminate groundwater for decades.
Biosolids & Runoff
Wastewater biosolids applied to farmland as fertilizer carry PFAS into soil and eventually into watershed systems.
Removing PFAS from Houston Water
Reverse Osmosis (RO)
Under-sink RO systems force water through a semi-permeable membrane, removing PFAS along with lead, arsenic, and other contaminants.
- Highest PFAS removal rate available
- NSF/ANSI 58 certified systems available
- Removes virtually all contaminants
- Point-of-use — treats drinking water directly
Activated Carbon (GAC)
Granular activated carbon and carbon block filters adsorb PFAS compounds. Better for long-chain PFAS (PFOA/PFOS) than short-chain variants.
- More affordable than RO
- NSF P473 certified options available
- Also removes chlorine, taste, and odor
- Pitcher, faucet, or under-sink formats
Ion Exchange Resin
Anion exchange resins specifically designed for PFAS removal. Effective for both long-chain and short-chain compounds.
- Effective on short-chain PFAS
- High flow rate capability
- Whole-house systems available
- Long media lifespan
A reverse osmosis system is strongly recommended for Houston. RO removes 99%+ of all PFAS compounds. Standard Brita pitchers do NOT remove PFAS.
More About Houston Water Quality
Frequently Asked Questions
PFAS in Houston WaterPFAS have been detected in Houston, TX drinking water at approximately 3.8 ppt. The EPA maximum contaminant level for PFOA and PFOS is 4 ppt individually.
A reverse osmosis system is strongly recommended for Houston. RO removes 99%+ of all PFAS compounds. Standard Brita pitchers do NOT remove PFAS.
PFAS exposure is linked to cancer, thyroid disease, immune suppression, reproductive issues, liver damage, and developmental effects in children.
Protect Your Family from PFAS in Houston
PFAS detected at 3.8 ppt. These chemicals don't break down and accumulate in your body over time.