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Federal water data

County water report

Oldham County Water Report

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

Water grade

F

Water score

31.8

State rank

#111

of 254

Health violations

1

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

1

147 recent measurements

Live streamflow

No gauge

Primary USGS station not mapped

Water at a glance

Key Water Indicators for Oldham County

EPA SDWIS

Safety Grade

F

Score: 31.8 / 100

EPA SDWIS

Active Violations

1

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

No gauge

Primary USGS gauge not mapped

EPA WQP

Monitoring Sites

1

147 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.

31.8/100

Health violations

1

Health-based violations

Violations per 100K served

57.7

Population-normalized SDWIS rate

Editorial analysis

Understanding Oldham County’s Water

Drinking Water Quality Overview

EPA SDWIS

Oldham County's water systems carry a failing grade, scoring 31.8 out of 100. Over the past five years, EPA SDWIS records 1 health-based violation — a single incident worth monitoring.

Monitoring Network

EPA WQP

EPA's Water Quality Portal (WQP) aggregates monitoring data from federal, state, and tribal agencies. Oldham County has limited coverage with 1 active monitoring site with 147 recent measurements on record. Predominant monitoring categories include physical and inorganics, major, non-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 Oldham County

Water Verdict

Oldham County receives a poor water quality assessment with a grade of F and a score of 31.8 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

Oldham County has recorded 1 health-based violation, meaning the water system experienced at least one exceedance of federal contaminant limits or treatment requirements. At 57.7 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Drinking-water compliance in Oldham County is rated Grade F, reflecting significant health-based violations in the recent reporting period. Oldham County's drinking-water compliance score is 31.8 out of 100. The violation rate for Oldham County is 57.7 per 100,000 people served. An NSF 53 or NSF 58-certified filter is recommended for drinking and cooking water. Check the Consumer Confidence Report from your utility to identify the specific contaminants and required corrective actions — utilities are legally required to notify customers of violations. There is 1 active water-quality monitoring site in Oldham County.

Regional Context

Oldham County has water quality close to the average county in Texas. Its water score is within 1.4 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 Oldham County's water environment

Official EPA Resources for Oldham County

EPA How's My Waterway

Interactive watershed health data for Oldham County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Oldham County

Consumer Confidence Reports (TX)

Annual water quality reports from utilities in Texas

Past 5 years

Water Quality Monitoring

Monitoring Sites

1

Active in the past 5 years

Measurements Recorded

147

147 total readings

Most Measured

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

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).

Free tool

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Water Cost Estimate

3

3 people  ·  ~225 gal/day

Annual Total

$558

Monthly

$47

Water Bill

$558/yr

Filter Cost

$0/yr

Safety Grade for Oldham 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 Oldham County, Texas?
Oldham County, Texas has a drinking-water quality grade of F with a score of 31.8/100, based on EPA SDWIS compliance data. The county has 1 health-based drinking water violation over the past 5 years. Watershed health, monitoring records, and streamflow snapshots are reported separately on this page.
Are there any water violations in Oldham County?
Oldham County has 1 health-based drinking water violation 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 Oldham County?
EPA's Water Quality Portal records 147 measurements from 1 monitoring sites in Oldham County over the past five years. The most frequently measured characteristic groups are Physical, Inorganics, Major, Non-metals, Microbiological. 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.
How does Oldham County water compare to the Texas average?
Oldham County's SDWIS water quality score of 31.8/100 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 Oldham County?
Based on EPA SDWIS data, Oldham County has a water quality grade of F (31.8/100). 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).
Does Oldham County have clean drinking water?
Oldham County has 1 health-based drinking water violation according to EPA records. With a water quality score of 31.8/100 and grade F, the county's drinking water has had some compliance issues but continues to be monitored. Note: drinking-water compliance speaks to the public water system, not necessarily to the watershed itself — check the Watershed Health zone for ATTAINS §303(d) data.
How does Oldham County rank for water quality in Texas?
Oldham County ranks #111 out of 254 counties in Texas by SDWIS water quality score (1 = best). With a score of 31.8/100, 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

Ector County

Texas

F

32.0

Water score

Grayson County

Texas

F

31.4

Water score

Tom Green County

Texas

F

32.3

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.

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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