A
96

US Water Score: A

Porter, TX 77365

Montgomery County · Population served: 80,073 · Data updated July 2026

Service-area evidence: EPA service-area records associate the listed system with this ZIP. Boundaries may still overlap or change.

Water Systems Serving This Area

🌊
CITY OF HOUSTON UD 5 - KINGWOOD
Groundwater · Pop. 80,073
PWSID: TX1010348
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PORTER SPECIAL UTILITY DISTRICT
Groundwater · Pop. 26,388
PWSID: TX1700068
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VALLEY RANCH MUD 1
Groundwater · Pop. 4,056
PWSID: TX1700752
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TIMBERLAND ESTATES
Groundwater · Pop. 2,886
PWSID: TX1700612
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WOODRIDGE MUD
Groundwater · Pop. 2,550
PWSID: TX1700859

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
1.88
15 ppb 1 ppb Warning

Violation History (Last 5 Years)

71Total (5yr)
12Health-Based
16Major

Water Quality Summary

Understanding Your Water in Porter

Tap water quality in Porter, Texas (77365) receives an overall grade of A (Excellent) with a score of 96 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 16 points above the Texas state average of 80. Compared to the national average (75), this area performs significantly better. The area is served by 17 water systems providing water to approximately 80,073 people, using groundwater sources. Testing has found elevated levels of Lead that warrant attention. Over the past 5 years, water systems here have accumulated 71 violations, including 12 health-based violations.

Your Score 96/100 A
vs State 16 pts above Texas avg (80)
vs National 21 pts above national avg (75)

What a Grade A Means

A score of 96/100 means public water-system records for Porter, TX show relatively few concerns in the US Water Score model. This is an internal score, not an EPA safety rating, and it does not guarantee conditions at any specific tap.

Groundwater: drawn from underground aquifers via wells

Health Information

What These Contaminants Mean for You

⚠️

Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

Common Questions

Frequently Asked Questions

Based on public water-system records, Porter, Texas receives an internal US Water Score grade of A (Excellent) with a score of 96/100. This indicates relatively few system-level concerns in our model, but it is not an EPA safety rating and does not guarantee tap conditions inside individual homes.

ZIP code 77365 is served by 17 water systems using groundwater sources, providing water to approximately 80,073 people. Groundwater is naturally filtered through rock and soil, often requiring less treatment. However, it can be vulnerable to contamination from underground sources like naturally occurring arsenic, nitrates from agriculture, or PFAS from industrial sites.

Lead was reported at 1.88 ppb in public-system records for Porter, Texas. This is below the currently applicable EPA action level of 15 ppb, but may be above more protective health guidance; EPA's future LCRI action level is 10 ppb. Household plumbing can materially change tap-level exposure, so consider certified filtration and individual tap testing, especially where children are present.

No PFAS ("forever chemicals") were detected in water systems serving Porter, Texas during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Porter, Texas have received 71 violations in the last 5 years, including 12 health-based violations. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (lead), residents in Porter, Texas should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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