Hillister, TX Water Safety: 73/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
Across Hillister, EPA monitoring data shows low violation rates and healthy safety margins — a pattern that places the city well above TX's average for drinking water compliance across recent reporting cycles.
How Hillister Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Hillister Residents
- Homes built before 1986: 65% — older plumbing may contain lead solder.
- Estimated remediation: $1,700 per household.
- CDC health risk index: 15.75 — above typical levels.
Hillister's Water Providers
Residential addresses in Hillister, TX are served by 3 primary water providers out of 3 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 1 ZIP code in Hillister, Texas (population ~706), covering 3 community water systems serving approximately 13,653 people region-wide.
No EPA violations recorded across any ZIP codes in Hillister — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Hillister: B (73/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Hillister water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Hillister
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 77624 | B | CITY OF WOODVILLE | 6,069 |
All ZIP Codes in Hillister
- 77624 [B]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Hillister Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Hillister Infrastructure Age
With 65% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Viewed through the lens of construction era, Hillister is predominantly an older city — a median build year of 1988 puts most of the residential inventory in the range where pre-1986 plumbing materials were the standard.
Over half of homes in Hillister were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Hillister
In Hillister, property values comfortably outpace what documented remediation typically costs — the equity share is proportionally low.
Remediation costs in Hillister are relatively low compared to home values. The $1,100–$2,600 estimated range is a small fraction of median property value. Home values are 11% below the Texas average.
Hillister: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Practically, the structural drivers in Hillister — 65% pre-rule stock and citywide monitoring at or beyond the regulatory benchmark — make an in-home draw the practical way to translate aggregate averages into the specific conditions at one address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Hillister: Flood History & Water Damage Risk
Flood activity in Hillister is neither negligible nor at the level of the highest-exposure areas in the NFIP dataset. The 1-claim record and 100% flood zone coverage suggest a community that has experienced recurrent events but has not faced the kind of sustained, severe exposure where water-supply contamination becomes a primary public health concern. It sits in a middle range where flood history merits inclusion in any complete local water quality picture.
Hillister has a moderate flood history with 1 FEMA claims averaging $14,913 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,700</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Hillister, TX