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County water report

Iberia Parish Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Iberia Parish, Louisiana.

Water grade

F

Water score

33.5

State rank

#23

of 63

Health violations

39

EPA SDWIS, 5-year lookback

Watershed impaired

81.7%

71 water bodies assessed

Monitoring sites

16

3,925 recent measurements

Live streamflow

No gauge

Primary USGS station not mapped

Water at a glance

Key Water Indicators for Iberia Parish

EPA SDWIS

Safety Grade

F

Score: 33.5 / 100

EPA SDWIS

Active Violations

39

5-year health-based lookback

EPA ATTAINS

Watershed Health

82% impaired

71 bodies assessed

USGS NWIS

Streamflow Snapshot

No gauge

Primary USGS gauge not mapped

EPA WQP

Monitoring Sites

16

3,925 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.

33.5/100

Health violations

39

Health-based violations

Violations per 100K served

52.0

Population-normalized SDWIS rate

Editorial analysis

Understanding Iberia Parish’s Water

Drinking Water Quality Overview

EPA SDWIS

Iberia Parish's water systems carry a failing grade, scoring 33.5 out of 100. Over the past five years, EPA SDWIS records 39 health-based violations — a pattern that public water utilities are required to disclose and correct.

Watershed Conditions

EPA ATTAINS

Under the Clean Water Act §303(d), EPA ATTAINS tracks whether waterways meet quality standards for drinking, recreation, and aquatic life (reporting cycle: 2022). A large majority — 81.7% — of assessed waterways are impaired (58 of 71 water bodies) across Iberia Parish's watersheds. The leading impairment causes are dissolved oxygen and fecal coliform. Impairment does not mean tap water is unsafe — it measures ambient waterway conditions upstream of treatment, not finished drinking water.

Monitoring Network

EPA WQP

EPA's Water Quality Portal (WQP) aggregates monitoring data from federal, state, and tribal agencies. Iberia Parish has moderate coverage with 16 active monitoring sites with 3,925 recent measurements on record. Predominant monitoring categories include physical and nutrient. 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 Iberia Parish

Water Verdict

Iberia Parish receives a poor water quality assessment with a grade of F and a score of 33.5 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

Iberia Parish has recorded 39 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 52.0 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Iberia Parish has a Grade F compliance record with 39 health-based violations — among the highest levels in the country. Iberia Parish's drinking-water compliance score is 33.5 out of 100. The violation rate for Iberia Parish is 52.0 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 Louisiana Department of Environmental Quality or Health can expedite utility compliance action. Dissolved Oxygen is the leading impairment cause in Iberia Parish's watershed. With 16 active water-quality monitoring sites in Iberia Parish, data coverage is strong.

Regional Context

Iberia Parish has water quality close to the average county in Louisiana. Its water score is within 3.4 points of the state average, meaning its overall water system performance is broadly representative of Louisiana 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 Iberia Parish's water environment

Watershed Impairment Causes (EPA ATTAINS)

  • 1

    Low dissolved oxygen

    Impairment cause per EPA Clean Water Act §303(d) assessment

  • 2

    Fecal coliform bacteria

    Impairment cause per EPA Clean Water Act §303(d) assessment

  • 3

    High turbidity

    Impairment cause per EPA Clean Water Act §303(d) assessment

Source: EPA ATTAINS · Reporting cycle 2022

Official EPA Resources for Iberia Parish

EPA How's My Waterway

Interactive watershed health data for Iberia Parish

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Iberia Parish

Consumer Confidence Reports (LA)

Annual water quality reports from utilities in Louisiana

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

81.7%

58 of 71 assessed

High concern

Top Impairment Causes

  • 1

    DISSOLVED OXYGEN

  • 2

    FECAL COLIFORM

  • 3

    TURBIDITY

Source: EPA ATTAINS · Reporting cycle 2022

Impairment is determined under the Clean Water Act §303(d): a water body is impaired when it fails to meet state-defined quality standards for designated uses (drinking, recreation, aquatic life). Assessment coverage varies by state; counties without assessed water bodies are not shown.

Past 5 years

Water Quality Monitoring

Monitoring Sites

16

Active in the past 5 years

Measurements Recorded

3.9K

3,925 total readings

Most Measured

  • Physical
  • Nutrient
  • Organics, Other

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).

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Water Cost Estimate

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Annual Total

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Monthly

$47

Water Bill

$558/yr

Filter Cost

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Safety Grade for Iberia Parish: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 Iberia Parish, Louisiana?
Iberia Parish, Louisiana has a drinking-water quality grade of F with a score of 33.5/100, based on EPA SDWIS compliance data. The county has 39 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 Iberia Parish?
Iberia Parish has 39 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 healthy are the watersheds in Iberia Parish?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 81.7% of Iberia Parish's 71 assessed water bodies are classified as impaired (58 impaired). The top reported causes are DISSOLVED OXYGEN, FECAL COLIFORM, TURBIDITY. Impairment means the water body fails to meet state quality standards for at least one designated use — drinking water source, recreation, aquatic life, or fish consumption. Note: watershed impairment doesn't always translate to tap-water issues; treatment plants can remove most regulated contaminants.
How much water-quality monitoring happens in Iberia Parish?
EPA's Water Quality Portal records 3,925 measurements from 16 monitoring sites in Iberia Parish over the past five years. The most frequently measured characteristic groups are Physical, Nutrient, Organics, Other. 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 Iberia Parish water compare to the Louisiana average?
Iberia Parish's SDWIS water quality score of 33.5/100 is higher than the Louisiana state average of 30.1. The average water quality grade across Louisiana is F, based on data from 63 counties with available SDWIS data.
Is tap water safe to drink in Iberia Parish?
Based on EPA SDWIS data, Iberia Parish has a water quality grade of F (33.5/100). 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 Iberia Parish have so many water violations?
Iberia Parish has 39 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 Iberia Parish rank for water quality in Louisiana?
Iberia Parish ranks #23 out of 63 counties in Louisiana by SDWIS water quality score (1 = best). With a score of 33.5/100, 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

Tangipahoa Parish

Louisiana

F

35.4

Water score

Vernon Parish

Louisiana

F

36.3

Water score

St. Tammany Parish

Louisiana

F

36.4

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.

Watershed health and impaired-waterway data from the EPA ATTAINS Clean Water Act §303(d) assessments, state-reported and EPA-finalized.

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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