Tap Truth EPA drinking water records, in plain English

Public water system record

Zapata County Waterworks SWTP

Serves Zapata, Falcon Mesa, Medina and 1 more place, Zapata County, TX · 13,736 people served

Federal records show 1 health-based violation and 2 monitoring/reporting issues for Zapata County Waterworks SWTP in the last ten years. The most serious issue in this window was a resolved Revised Total Coliform Rule violation.

  • TX2530002
  • ZAPATA
  • TX
  • 13,736 served

System profile

Source water Surface water
ZIP 78076
EPA system ID TX2530002

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
2

Key facts

  • Zapata County Waterworks SWTP draws water from 1 surface water intake.
  • Most recent enforcement action: boil water order by Texas, June 2023.
  • Record on file since 1992, with 17 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 490 unknown out of 4,757 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Revised Total Coliform Rule
Contaminant limit exceeded
 110 Jun 1, 2023 Resolved Yes

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Consumer Confidence Rule
OTHER
 Jul 2, 2024 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2022 Resolved

Full record since 1992

EPA's records for Zapata County Waterworks SWTP go back to 1992. Before October 19, 2016 they list 17 health-based violations (17 resolved) and 2 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 1
2000s 15 1
2010 to October 18, 2016 2 0
2020s 1 2

Most recent health-based violation before October 19, 2016: Interim Enhanced Surface Water Treatment Rule (acute), began August 2010, Resolved.

Show all 17 health-based violations before October 19, 2016
Contaminant Start date Status
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Aug 1, 2010 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Aug 1, 2010 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jan 1, 2006 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
 Oct 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.134 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 Oct 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.06 mg/L (1.6 times the limit)
 Jul 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.155 mg/L, federal limit 0.08 mg/L (1.9 times the limit)
 Jul 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.06 mg/L (1.6 times the limit)
 Apr 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.177 mg/L, federal limit 0.08 mg/L (2.2 times the limit)
 Apr 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.119 mg/L, federal limit 0.06 mg/L (2 times the limit)
 Jan 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.198 mg/L, federal limit 0.08 mg/L (2.5 times the limit)
 Jan 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.21 mg/L, federal limit 0.08 mg/L (2.6 times the limit)
 Oct 1, 2004 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.125 mg/L, federal limit 0.06 mg/L (2.1 times the limit)
 Oct 1, 2004 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.156 mg/L, federal limit 0.08 mg/L (2 times the limit)
 Jul 1, 2004 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 Jul 1, 2004 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 Apr 1, 2004 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.105 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Apr 1, 2004 Resolved

Enforcement actions

Texas regulators took 1 formal enforcement action against Zapata County Waterworks SWTP and issued 1 boil water order between 2006 and 2023. The most recent was a boil water order in June 2023.

Date By Action Violations covered
Jun 8, 2023 Texas Boil water order 1 violation (1 health-based): Revised Total Coliform Rule
Feb 5, 2006 Texas Compliance order with a penalty 15 violations (15 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)

What the violations mean

Revised Total Coliform Rule

1 incident

The system did not meet a requirement of the Revised Total Coliform Rule

Coliform and E. coli rules protect against bacteria in the distribution system

Where the water comes from

Zapata County Waterworks SWTP draws water from 1 surface water intake. 1 other community water system buys water from Zapata County Waterworks SWTP. 1 other public water system has an emergency connection to Zapata County Waterworks SWTP.

Community systems that buy water from it

Annual water quality report

Zapata County Waterworks SWTP must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Texas.

Certified drinking water labs by state EPA guidance for private wells