Texas · population 74,316
Lead pipes in San Marcos, TX
1,515 lead or galvanized lines to replace
Most of San Marcos (population 74,316) gets its water from City of San Marcos. That system reported 0 lead and 1,515 galvanized-requiring-replacement service lines out of 17,681, with 3,146 more of unknown material.
8.6% of City of San Marcos's service lines are lead or galvanized requiring replacement, higher than the Texas average (1.2%) and higher than the national average (3.1%).
- Lead 0%
- Galvanized (replace) 8.6%
- Unknown 18%
- Non-lead 74%
Latest lead test for City of San Marcos (Jan 2022–Dec 2024): 1.6 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists 1 Lead and Copper Rule violation since 2015 for City of San Marcos.
Water systems serving San Marcos
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| City of San MarcosMain system | 0 | 1,515 | 3,146 | 8.6% |
| Texas State University - San MarcosServes nearby areas | 1 | 15 | 0 | 18% |
Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.
Check your address in San Marcos
The counts above cover the whole water system. To see whether your line is lead, look up your address on City of San Marcos's official inventory. Utilities had to make these public by October 16, 2024.
No map yet? Do the 2-minute scratch and magnet test.
Protect your drinking water
If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.
Choosing a lead-certified filter · Testing your water · Replacement cost
Nearby cities
- Martindaleno lead reported
- Kyle99 lead + galv. lines
- Uhlandno lead reported
- Wimberleyno lead reported
- Buda185 lead + galv. lines
- Woodcreek7 unknown
- Lockhart3,935 unknown
- New Braunfels3,267 lead + galv. lines
Check another water system
Questions
Does San Marcos, TX have lead pipes?
Yes. City of San Marcos, which serves San Marcos, reported 0 lead and 1,515 galvanized-requiring-replacement service lines, plus 3,146 of unknown material.
Who supplies water to San Marcos?
EPA's service area maps place most of San Marcos in City of San Marcos's service area (PWSID TX1050001). Texas State University - San Marcos also serves parts of the city or nearby areas.
How do I check whether my San Marcos home has a lead service line?
Search your address on City of San Marcos's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.
When will lead pipes in San Marcos be replaced?
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask City of San Marcos whether your street is scheduled and whether it covers the private side.