Texas · drinking water · SDWIS through latest publish

City Of Cotulla Water Quality — Cotulla, Texas

PWSID TX1420001 · GroundwaterMunicipal

5,640 people served. 1 health-based SDWIS violation recorded in the past 5 years. 35 remain unresolved. Last cited 1 year ago.

ALL SDWIS VIOLATIONS · 20212026 (annual count)
Bar chart of annual values from 2021 to 2026, in violations. Most recent year (2026): 0 violations.34 violations'21'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 7000

Unresolved Phase I/II/V Synthetic Organic Chemical Rules violation cited in 2025 (contaminant 7000).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 5200

Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5200).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 5200

Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5200).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Endrin

Unresolved Nitrate/Nitrite violation cited in 2022 (endrin).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • E. coli10 citations
  • Contaminant 75003 citations
  • Contaminant 52002 citations
  • Endrin2 citations
  • Lindane2 citations
  • Methoxychlor2 citations
Violation history

What's On The SDWIS Record

Health-based violations exceed an MCL or treatment-technique standard. Monitoring violations are reporting failures with no measured exceedance — they tell you the system isn't fully transparent, not that the water is unsafe today.

OTHER · CONTAMINANT 7500

2025 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7000UNRESOLVED

2025 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER

CONTAMINANT CODE 7000

HEALTH-BASED · CONTAMINANT 5200UNRESOLVED

2024 · Contaminant 5200 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation

CONTAMINANT CODE 5200

MONITORING · CONTAMINANT 5200UNRESOLVED

2024 · Contaminant 5200 · Phase I/II/V Inorganic Chemical Rules

Reporting failure

CONTAMINANT CODE 5200

OTHER · CONTAMINANT 7500

2023 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500

2023 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

MONITORING · E. COLI

2023 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2023 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2022 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2022 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · ENDRINUNRESOLVED

2022 · Endrin · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2005

MONITORING · ENDRINUNRESOLVED

2022 · Endrin · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2005

MONITORING · LINDANEUNRESOLVED

2022 · Lindane · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2010

MONITORING · LINDANEUNRESOLVED

2022 · Lindane · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2010

MONITORING · METHOXYCHLORUNRESOLVED

2022 · Methoxychlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2015

MONITORING · METHOXYCHLORUNRESOLVED

2022 · Methoxychlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2015

MONITORING · TOXAPHENEUNRESOLVED

2022 · Toxaphene · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2020

MONITORING · TOXAPHENEUNRESOLVED

2022 · Toxaphene · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2020

MONITORING · CONTAMINANT 2035UNRESOLVED

2022 · Contaminant 2035 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2035

MONITORING · CONTAMINANT 2035UNRESOLVED

2022 · Contaminant 2035 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2035

MONITORING · CONTAMINANT 2037UNRESOLVED

2022 · Contaminant 2037 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2037

MONITORING · CONTAMINANT 2037UNRESOLVED

2022 · Contaminant 2037 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2037

MONITORING · CONTAMINANT 2039UNRESOLVED

2022 · Contaminant 2039 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2039

MONITORING · CONTAMINANT 2039UNRESOLVED

2022 · Contaminant 2039 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2039

MONITORING · CONTAMINANT 2042UNRESOLVED

2022 · Contaminant 2042 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2042

MONITORING · CONTAMINANT 2042UNRESOLVED

2022 · Contaminant 2042 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2042

MONITORING · 2,4-DUNRESOLVED

2022 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2050

MONITORING · 2,4-DUNRESOLVED

2022 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2050

MONITORING · CONTAMINANT 2051UNRESOLVED

2022 · Contaminant 2051 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2051

MONITORING · CONTAMINANT 2051UNRESOLVED

2022 · Contaminant 2051 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2051

MONITORING · 2,4,5-TP (SILVEX)UNRESOLVED

2022 · 2,4,5-TP (Silvex) · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2065

MONITORING · 2,4,5-TP (SILVEX)UNRESOLVED

2022 · 2,4,5-TP (Silvex) · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2065

MONITORING · CONTAMINANT 2067UNRESOLVED

2022 · Contaminant 2067 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2067

MONITORING · CONTAMINANT 2067UNRESOLVED

2022 · Contaminant 2067 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2067

MONITORING · CONTAMINANT 2274UNRESOLVED

2022 · Contaminant 2274 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2274

MONITORING · CONTAMINANT 2274UNRESOLVED

2022 · Contaminant 2274 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2274

MONITORING · CARBOFURANUNRESOLVED

2022 · Carbofuran · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2306

MONITORING · CARBOFURANUNRESOLVED

2022 · Carbofuran · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2306

MONITORING · CONTAMINANT 2326UNRESOLVED

2022 · Contaminant 2326 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2326

MONITORING · CONTAMINANT 2326UNRESOLVED

2022 · Contaminant 2326 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2326

MONITORING · CONTAMINANT 2959UNRESOLVED

2022 · Contaminant 2959 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2959

MONITORING · CONTAMINANT 2959UNRESOLVED

2022 · Contaminant 2959 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2959

MONITORING · E. COLI

2021 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2021 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2021 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2021 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2021 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2021 · E. coli · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

Equity context · ACS 2018-2022 · USEPA-clone EJ disparity

Who Drinks This Water

Cotulla, Texas (Census place; block-group disparity scores aggregated by centroid containment): a service population of 3,714. Local disparity score for pm2.5 (fine particulate) sits well above the reference burden (175). Why we surface this →

POPULATION SHARE
36.7%

Low-income

POPULATION SHARE
97.5%

People of color

POPULATION SHARE
9.5%

Under age 5

POPULATION SHARE
15.9%

Over age 64

NATIONAL PERCENTILE · vs all US block groups (population-weighted; ranked against the national EJScreen indicator distribution)

  • PM2.5 (fine particulate)Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.59near the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.49near the national median
  • Nitrogen dioxide (NO₂)Health riskA tailpipe and combustion gas. Concentrates near busy roads and industrial sites; raises risk of airway inflammation, asthma, and lower respiratory infections in children.67above the national median
  • Diesel particulateHealth riskSoot from diesel engines (trucks, trains, ports, construction). EPA classifies it as a likely human carcinogen and a major driver of childhood asthma near freight corridors.42near the national median
  • Toxic releases (RSEI)Health riskEPA's Risk-Screening Environmental Indicators score — weights TRI chemical releases by toxicity, where they go, and how many people are nearby. Higher means greater modeled cancer and chronic-health risk.1below the national median
  • Traffic proximityHealth riskPopulation-weighted distance to high-volume roads. Living close to heavy traffic raises exposure to PM2.5, NO₂, and diesel exhaust — and the cardiovascular and asthma risks that follow.11below the national median
  • Lead-paint risk (pre-1960 housing)Health riskShare of housing built before 1960, when lead-based paint was common. Dust from deteriorating paint is the leading cause of childhood lead poisoning, which permanently impairs cognitive development.49near the national median
  • Superfund site proximityHealth riskPopulation-weighted distance to NPL Superfund sites — the most contaminated waste sites in the country. Nearby groundwater, soil, and air can carry industrial solvents, metals, and other long-lived contaminants.56near the national median
  • RMP-facility proximityHealth riskDistance to facilities holding chemicals at quantities large enough to require an EPA Risk Management Plan (refineries, fertilizer plants, etc.). These pose acute exposure risk during accidental releases.62above the national median
  • Hazardous-waste site proximityHealth riskDistance to RCRA hazardous-waste handlers (treatment, storage, disposal facilities). Indicates potential exposure to industrial chemicals in air, soil, and groundwater.14below the national median
  • Underground storage tanksHealth riskDensity of underground tanks (gasoline, heating oil, industrial fluids). Leaking tanks are a leading source of benzene and other volatile organic compounds in groundwater drinking-water supplies.67above the national median
  • NPDES wastewater proximityHealth riskDistance to permitted industrial wastewater dischargers. Closer proximity raises exposure to pollutants released into surface waters used for fishing, recreation, and downstream drinking-water intakes.49near the national median
  • Drinking-water non-complianceHealth riskEPA score for public water systems with health-based Safe Drinking Water Act violations. Higher means more residents on systems that recently exceeded safe limits for contaminants like lead, arsenic, or nitrate.76above the national median
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)175well above the reference burden
Ozone96near the reference
Nitrogen dioxide (NO₂)190well above the reference burden
Diesel particulate125moderately above the reference
Toxic releases (RSEI)3well below the reference
Traffic proximity36well below the reference
Lead-paint risk (pre-1960 housing)114moderately above the reference
Superfund site proximity0well below the reference
RMP-facility proximity176well above the reference burden
Hazardous-waste site proximity0well below the reference
Underground storage tanks183well above the reference burden
NPDES wastewater proximity135moderately above the reference
Drinking-water non-compliance0well below the reference

Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).

Source. EPA Safe Drinking Water Information System · retrieved 2026-05-07. Reporting period 2021-01-012026-05-07.

What this is not. SDWIS records compliance against federal MCLs — not a direct readout of tap-water concentrations. Active health-based violations are not the same as a current crisis; we link to the EPA record so you can verify return-to-compliance status before forming a conclusion.