Round Top, TX Water Safety: 66/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
Although much of Round Top meets baseline drinking water standards, some TX-tracked service areas show violations that merit a closer look — particularly for older housing stock.
How Round Top Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Round Top Water
- Homes built before 1986: 48% — older plumbing may contain lead solder.
- CDC health risk index: 13.72 — above typical levels.
Who Supplies Your Water in Round Top
With 3 utilities splitting service in Round Top, TX, water accountability is distributed across 3 systems on the federal record.
Overview
We track water quality and home safety data for 1 ZIP code in Round Top, Texas (population ~1,378), covering 3 community water systems serving approximately 5,151 people region-wide.
No EPA violations recorded across any ZIP codes in Round Top — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Round Top: C (66/100)
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
Round Top water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Round Top
- 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 |
|---|---|---|---|
| 78954 | C | CITY OF CARMINE | 375 |
All ZIP Codes in Round Top
- 78954 [C]
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.
Health Outcomes in Round Top
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
Housing & Infrastructure in Round Top
With 48% 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
Because Round Top's housing stock spans a wide range of construction eras, the median build year of 1982 lands in a zone where two distinct risk populations share the same residential market. Homes built before 1986 may have lead-soldered copper plumbing joints — that practice was federally prohibited in 1986 but remained standard until then. The fraction built before 1970 face an additional risk: lead pipes used for service line connections were common before that decade, meaning both the pipe and the solder may be lead-containing in the oldest structures. Residents in mid-century or earlier homes face a different risk environment than neighbors in houses built after 1986, even if they drink from the same utility's supply — and that property-level divergence is what makes the age distribution above more diagnostic than the city-wide median alone.
A significant portion of Round Top's housing stock predates 1970, when lead pipes were commonly used. Residents in older homes should consider water testing.
Source: U.S. Census Bureau ACS B25034.
Lead Exposure Risk for Children in Round Top
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.
In recent monitoring under the Lead and Copper Rule, citywide samples for Round Top have approached or crossed the regulatory action level on multiple occasions. Combined with 48% of stock dating from the pre-rule era, the picture supports baseline single-tap reads as a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Round Top
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 48% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Round Top, TX