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Federal water data

County water report

Webb County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Webb County, Texas.

Water grade

F

Water score

34.9

State rank

#105

of 254

Health violations

129

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

11

2,552 recent measurements

Live streamflow

0%

San Casimiro Ck nr Freer, TX

Water at a glance

Key Water Indicators for Webb County

EPA SDWIS

Safety Grade

F

Score: 34.9 / 100

EPA SDWIS

Active Violations

129

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

0% of mean

San Casimiro Ck nr Freer, TX

EPA WQP

Monitoring Sites

11

2,552 recent readings

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

F

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

34.9/100

Health violations

129

Health-based violations

Violations per 100K served

47.2

Population-normalized SDWIS rate

Editorial analysis

Understanding Webb County’s Water

Drinking Water Quality Overview

EPA SDWIS

Webb County's water systems carry a failing grade, scoring 34.9 out of 100. Over the past five years, EPA SDWIS records 129 health-based violations — a pattern that public water utilities are required to disclose and correct.

River & Streamflow Status

USGS NWIS

USGS NWIS gauge data (as of 2026-05-14T14:00:00.000-05:00) puts San Casimiro Ck at 0.0 cfs — well below its long-term average at 0% of mean — low-flow conditions worth noting for water-dependent ecosystems. Streamflow is a leading indicator of drought stress, sediment load, and dilution capacity: low flows concentrate pollutants and warm water temperatures, stressing aquatic life and, in surface-water-dependent systems, the source water quality for treatment plants.

Monitoring Network

EPA WQP

EPA's Water Quality Portal (WQP) aggregates monitoring data from federal, state, and tribal agencies. Webb County has moderate coverage with 11 active monitoring sites with 2,552 recent measurements on record. Predominant monitoring categories include physical and inorganics, major, metals. More monitoring sites generally indicate greater scientific attention to local water conditions — and provide the baseline data that regulators use to set future impairment listings.

Editorial advisory

What the data suggests for Webb County

Water Verdict

Webb County receives a poor water quality assessment with a grade of F and a score of 34.9 out of 100. The water supply has documented quality issues. Residents are strongly encouraged to use filtered or bottled water for drinking and to stay informed about utility improvement plans.

Violation Context

Webb County has recorded 129 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 47.2 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Webb County has a Grade F compliance record with 129 health-based violations — among the highest levels in the country. Webb County's drinking-water compliance score is 34.9 out of 100. The violation rate for Webb County is 47.2 per 100,000 people served. Residents are strongly advised to use a certified NSF 58 reverse-osmosis filter or bottled water for all drinking and cooking until violations are corrected. Contacting the Texas Department of Environmental Quality or Health can expedite utility compliance action. With 11 active water-quality monitoring sites in Webb County, data coverage is strong. A pipeline streamflow snapshot from the San Casimiro Ck gauge is also available on this page.

Regional Context

Webb County has water quality close to the average county in Texas. Its water score is within 4.5 points of the state average, meaning its overall water system performance is broadly representative of Texas as a whole.

Advisory text summarizes county-level public records and is not a replacement for your utility's current Consumer Confidence Report or direct local notices.

Contaminants & Resources

Key issues flagged in Webb County's water environment

Official EPA Resources for Webb County

EPA How's My Waterway

Interactive watershed health data for Webb County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Webb County

Consumer Confidence Reports (TX)

Annual water quality reports from utilities in Texas

Past 5 years

Water Quality Monitoring

Monitoring Sites

11

Active in the past 5 years

Measurements Recorded

2.6K

2,552 total readings

Most Measured

  • Physical
  • Inorganics, Major, Metals
  • Inorganics, Major, Non-metals

Categories measured most frequently

Data from the EPA Water Quality Portal (WQP), aggregating monitoring records from federal, state, and tribal sources. Each measurement represents a single sample analyzed for a specific characteristic (e.g., E. coli, pH, dissolved oxygen, nitrogen).

Live USGS Streamgage

River & Stream Conditions

Current Discharge

0.00cfs

May 14, 7:00 PM UTC

vs Long-Term Average

0%

Well below typical

Primary Streamgage

San Casimiro Ck nr Freer, TX

USGS site
08194200
Drainage area
469 sq mi
Long-term mean
44.0 cfs

One representative streamgage (the one with the largest drainage area in the county). Many counties have multiple gauges; this view summarizes the primary one. The long-term mean is the full-record annual average; the percent-of-typical value compares the latest reading against that average.

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Water Cost Estimate

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Annual Total

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Monthly

$47

Water Bill

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Filter Cost

$0/yr

Safety Grade for Webb County:F — Failing

High violation count or severe watershed conditions.

Estimates use the national average residential water rate ($0.0068/gal, EPA/AWWA 2023) and EPA WaterSense per-person consumption baseline (75 gal/person/day). Actual bills vary by utility, usage tier, and local infrastructure fees. For informational purposes only.

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Frequently Asked Questions

What is the water quality in Webb County, Texas?
Webb County, Texas has a drinking-water quality grade of F with a score of 34.9/100, based on EPA SDWIS compliance data. The county has 129 health-based drinking water violations over the past 5 years. Watershed health, monitoring records, and streamflow snapshots are reported separately on this page.
Are there any water violations in Webb County?
Webb County has 129 health-based drinking water violations recorded by the EPA over the past 5 years. Health-based violations indicate instances where contaminant levels exceeded EPA Maximum Contaminant Levels (MCLs). Violations may have been resolved — check with your local water utility for current status.
How much water-quality monitoring happens in Webb County?
EPA's Water Quality Portal records 2,552 measurements from 11 monitoring sites in Webb County over the past five years. The most frequently measured characteristic groups are Physical, Inorganics, Major, Metals, Inorganics, Major, Non-metals. Each measurement is a single sample analyzed for one characteristic (E. coli, pH, dissolved oxygen, etc.). High monitoring density means more scientific evidence behind any reported signal — it does not by itself indicate water quality.
What's happening with rivers in Webb County right now?
Webb County's primary USGS streamgage on the San Casimiro Ck has a pipeline snapshot of 0 cubic feet per second — 0% of the long-term mean of 44 cfs. This is well below typical — often a signal of drought stress on source water. For the latest gauge feed, visit waterdata.usgs.gov.
How does Webb County water compare to the Texas average?
Webb County's SDWIS water quality score of 34.9/100 is higher than the Texas state average of 30.4. The average water quality grade across Texas is F, based on data from 254 counties with available SDWIS data.
Is tap water safe to drink in Webb County?
Based on EPA SDWIS data, Webb County has a water quality grade of F (34.9/100). This indicates below-average compliance with significant violations. Residents may want to consider home water filtration or independent testing. The grade speaks to the public water system, not the watershed — for watershed-level concerns, see the Watershed Health zone. For the most up-to-date information, contact your local water utility or review your Consumer Confidence Report (CCR).
Why does Webb County have so many water violations?
Webb County has 129 health-based drinking water violations on record from the EPA SDWIS database. A higher violation count can result from aging infrastructure, underfunded water utilities, agricultural runoff contamination, or industrial pollution. Counties with more water systems may also see more violations simply due to scale. Residents concerned about water quality should consider independent water testing and home filtration systems.
How does Webb County rank for water quality in Texas?
Webb County ranks #105 out of 254 counties in Texas by SDWIS water quality score (1 = best). With a score of 34.9/100, it falls in the middle third of counties statewide. The ranking reflects EPA SDWIS compliance only — not watershed impairment, monitoring density, or streamflow, which are tracked separately on this page.

Counties with Similar Water Quality

Montague County

Texas

F

34.9

Water score

Hudspeth County

Texas

F

35.0

Water score

Culberson County

Texas

F

34.7

Water score

Data Sources

Drinking-water compliance data from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Water-quality monitoring counts from the EPA Water Quality Portal (WQP), federated USGS, EPA, and state agency sampling records over a rolling 5-year window.

Live streamflow from the USGS National Water Information System (NWIS), continuous discharge measurements from the largest-drainage gauge in each county, compared against the full-record long-term annual mean.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

By Evan Brooks, Data EditorUpdated Reviewed by Evan Brooks, Data Editor

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