Tap Water Texas

Utility · TX1050001

CITY OF SAN MARCOS

CITY OF SAN MARCOS (PWSID TX1050001) is an active community water system in Texas serving about 72,970 people through roughly 42,746 service connections. Its primary source is listed as surface water (lakes/rivers). Cities/areas associated with this system in EPA geographic data: San Marcos. In recent EPA records indexed here, we found 2 violation record(s), including 1 health-based and 0 still listed as addressed/unaddressed (not fully resolved). This page summarizes public EPA SDWA/ECHO data for educational purposes. It is not a substitute for your utility’s official Consumer Confidence Report or public notices.

72,970population served
42,746service connections
1health-based viol.
2viol. rows indexed
EPA ECHO facility search tipContaminant guides

System facts

  • PWSID: TX1050001
  • Type: Community water system (active)
  • Primary source: Surface water (lakes/rivers)
  • Owner type: Local government
  • Wholesaler flag: Yes
  • Phone (EPA record): 512-393-8107
  • Address (EPA record): 630 E HOPKINS ST, San Marcos 78666

Service geography

Cities/areas:

San Marcos

Counties: Hays

ZIPs served (EPA geo): —

Recent violation records (indexed subset)

Showing up to 40 recent violation identities (2021+ when dated), deduplicated from SDWA_VIOLATIONS_ENFORCEMENT. Status meanings come from EPA’s data dictionary (Resolved / Addressed / Unaddressed / Archived).

BeginContaminant / issueViolationCategoryHealth-basedStatusResult / MCL
10/01/2025TTHMMaximum Contaminant Level Violation, AverageMCLYesResolved.081 MG/L / MCL 0.080 mg/L
02/01/2021ChloriteMonitoring and Reporting (DBP)MRNoResolved— / MCL 1.0 mg/L

Lead & copper rule sample highlights

Codes PB90 / CU90 in SDWIS typically represent 90th percentile lead/copper monitoring results under the Lead and Copper Rule.

Lead (PB90)

  • 12/31/2024: .00163 mg/L
  • 12/31/2021: .00191 mg/L
  • 12/31/2017: .0028 mg/L
  • 12/31/2015: .0034 mg/L
  • 12/31/2012: .00314 mg/L
  • 12/31/2010: .00343 mg/L
  • 12/31/2007: .003 mg/L
  • 12/31/2001: .0024 mg/L

Lead explainer →

Copper (CU90)

No LCR copper samples in the extracted slice.

Copper explainer →

FAQs

What does PWSID TX1050001 mean?

A Public Water System Identification number uniquely identifies a system in EPA’s Safe Drinking Water Information System (SDWIS). Texas IDs start with TX.

How current is this page?

Systems and geography reflect the EPA SDWA quarterly snapshot used for this build. Violation rows are a filtered recent subset (generally 2021+) and capped for readability—always confirm on ECHO and your CCR.

What should I do if I see a health-based violation?

Read the dates and status. Contact the utility for context, check for public notices, and review the newest Consumer Confidence Report. For medical concerns, talk with a clinician—this site is educational only.

Do lead/copper samples mean my home is safe?

LCR samples are utility monitoring results (often 90th percentile summary codes like PB90/CU90), not a test of every tap. Home plumbing can differ. Consider a certified lab test if you have reason for concern.

Citations