City · TRI 2024

Los Fresnos, Texas Pollution

0 TRI facilities inside the city limits and 2 public water systems serving residents.

FIPS 4844120 · population 197 · Cameron County

Anomaly engine

Notable Signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Total Trihalomethanes (TTHM)

Unresolved Total Trihalomethanes Rule violation cited in 2025 (total trihalomethanes (tthm)).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Total Trihalomethanes (TTHM)

Unresolved Total Trihalomethanes Rule violation cited in 2025 (total trihalomethanes (tthm)).

EPA SDWIS record

Pollutant pathways

Los Fresnos Pollutant Multi-Year Trends

CRITERIA AIRSINCE 2010

PM2.5 annual mean (NAAQS 9 µg/m³ (annual))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.

15.61 µg/m³ · +67% YoY · +64% since 2010

PM2.5 annual mean (NAAQS 9 µg/m³ (annual)) concentrations are up 64% since 2010.

CRITERIA AIRSINCE 2010

PM2.5 24-hour 98th percentile (NAAQS 35 µg/m³ (24-hour))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.

53.75 µg/m³ · +111% YoY · +194% since 2010

PM2.5 24-hour 98th percentile (NAAQS 35 µg/m³ (24-hour)) concentrations have more than doubled since 2010.

CRITERIA AIRSINCE 2010

Ozone 8-hour 4th-highest daily max (NAAQS 0.070 ppm (8-hour))Health riskGround-level ozone (smog) forms when vehicle and industrial emissions react in sunlight. Inflames the airways, triggers asthma attacks, and worsens heart and lung disease.

0.056 ppm · -7% YoY · -13% since 2010

Ozone 8-hour 4th-highest daily max (NAAQS 0.070 ppm (8-hour)) concentrations have fallen 13% since 2010.

HAZARDOUS AIR2020 VINTAGE

Lifetime cancer risk all pollutants (100 in a million (EPA elevated threshold))Health riskEPA-modeled added cancer cases per million residents from a lifetime of breathing local air toxics. EPA flags 100-in-a-million as elevated.

20.0 per million · 2020 vintage

Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.

HAZARDOUS AIR2020 VINTAGE

Formaldehyde ambient mean (0.077 µg/m³ (1-in-a-million URE))Health riskAn air toxic emitted by refineries, wood products, and combustion. EPA classifies it as a known human carcinogen — long-term inhalation raises cancer risk.

1.29 µg/m³ · 2020 vintage

Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.

HAZARDOUS AIR2020 VINTAGE

Benzene ambient mean (0.13 µg/m³ (1-in-a-million URE))Health riskAn air toxic from gasoline, refineries, and tobacco smoke. A known human carcinogen — chronic exposure is linked to leukemia and other blood cancers.

0.08 µg/m³ · 2020 vintage

Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.

TRI AIR2024 VINTAGE

TRI air releases (5.1 fugitive + 5.2 stack)Health riskToxic chemicals reported by industrial facilities as released into the air — fugitive leaks plus smokestack emissions. Higher pounds means more inhaled exposure for nearby residents.

0 lb · 2024 vintage

Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.

TRI WATER2024 VINTAGE

TRI water releases (5.3)Health riskToxic chemicals reported by industrial facilities as discharged to surface waters (rivers, lakes, the ocean). Affects fishing, recreation, and downstream drinking-water intakes.

0 lb · 2024 vintage

Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.

TRI LAND2024 VINTAGE

TRI land + off-site releasesHealth riskToxic chemicals released to land on-site or transferred off-site for disposal — landfills, deep-well injection, and similar. Risks groundwater contamination over time.

0 lb · 2024 vintage

Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.

GHGSINCE 2010

Greenhouse gases (GHGRP large emitters, through 2023)Health riskGreenhouse gases reported by large industrial emitters under EPA's GHGRP, in metric tons of CO₂ equivalent. Drives climate warming and the heat-related health effects that follow.

0.3M metric tons CO₂e · +40% YoY · +80% since 2010

Greenhouse gases (GHGRP large emitters, through 2023) concentrations are up 80% since 2010.

Drinking water · SDWIS

Water Systems Serving Los Fresnos

18 unresolved violations on the SDWIS record across utilities serving this city.

SDWIS · 5-YR WINDOW
2

Utilities serving

SDWIS · 5-YR WINDOW
6,897

Population served

SDWIS · 5-YR WINDOW
28

Health-based · 5yr

SDWIS · 5-YR WINDOW
18

Unresolved

Water systemPWSIDPopulation servedHealth-based · 5yrStatus
Town Of Indian Lake MunicipalTX031000888828UNRESOLVED

Showing the 1 system with recorded health-based or unresolved violations. 1 additional system is in compliance with no recorded health-based violations in the past 5 years and is not individually tabulated.

A public water systemis the regulated entity, not the city. EPA's SDWIS definition covers anything serving 25+ people for 60+ days a year or with 15+ service connections — that includes municipal utilities (City of Stockton), water districts, mobile home parks operating their own wells, schools, and small private subdivisions. Each system is independently monitored. Some systems serve multiple cities; some cities are served by many systems.

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

Who Lives In Los Fresnos

Los Fresnos, Texas (Census place block groups): 197 residents. Why we surface this →

POPULATION SHARE
0.0%

Low-income

POPULATION SHARE
100.0%

People of color

POPULATION SHARE
14.7%

Under age 5

POPULATION SHARE
5.6%

Over age 64

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

Sources.