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EPA SDWIS

West Baton Rouge Parish Water Quality

West Baton Rouge Parish, Louisiana

Water Grade

B

Water Score

65.3

Violations

1

State Rank

#10

of 63 (1 = best)

EPA SDWIS Compliance

Drinking Water Quality

Water Quality Grade

B

Based on EPA compliance history and violation data

Water Score

65.3/100

Higher = better quality

Health Violations

1

Health-based violations

Violation Rate

3.3%

Systems with violations

Water Advisory: West Baton Rouge Parish

Water Verdict

West Baton Rouge Parish receives a fair water quality assessment with a grade of B and a score of 65.3 out of 100. The water supply meets baseline federal standards, but there may be periods of elevated contaminant levels or infrastructure concerns worth monitoring.

Violation Context

West Baton Rouge Parish has recorded 1 health-based violation, meaning the water system experienced at least one exceedance of federal contaminant limits or treatment requirements. At 3.3 violations per 1,000 residents, this rate is moderate and suggests recurring water quality challenges.

Consumer Guidance

Tap water in West Baton Rouge Parish is generally safe to drink based on available data. Residents should still review their utility's annual Consumer Confidence Report for transparency on detected contaminants. With 1 recorded health violation, staying informed about utility communications and boil-water notices is especially important. For long-term peace of mind, request your utility's latest Consumer Confidence Report and consider independent water testing if you have specific health concerns.

Regional Context

West Baton Rouge Parish has better water quality than the average county in Louisiana. Its water score is 35.2 points higher than the state average, indicating stronger water system performance relative to neighboring counties.

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

86.8%

46 of 53 assessed

High concern

Top Impairment Causes

  • 1

    DISSOLVED OXYGEN

  • 2

    FECAL COLIFORM

  • 3

    MERCURY - FISH CONSUMPTION ADVISORY

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

20

Active in the past 5 years

Measurements Recorded

2.4K

2,426 total readings

Most Measured

  • Physical
  • Organics, Other
  • Nutrient

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

569.0Kcfs

May 14, 6:15 PM UTC

vs Long-Term Average

98%

Near typical

Primary Streamgage

Mississippi River at Baton Rouge, LA

USGS site
07374000
Drainage area
1,125,810 sq mi
Long-term mean
578.2K 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; "% of typical" compares the latest reading against that average.

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Frequently Asked Questions

What is the water quality in West Baton Rouge Parish, Louisiana?
West Baton Rouge Parish, Louisiana has a drinking-water quality grade of B with a score of 65.3/100, 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 live streamflow are reported separately on this page.
Are there any water violations in West Baton Rouge Parish?
West Baton Rouge Parish 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 healthy are the watersheds in West Baton Rouge Parish?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 86.8% of West Baton Rouge Parish's 53 assessed water bodies are classified as impaired (46 impaired). The top reported causes are DISSOLVED OXYGEN, FECAL COLIFORM, MERCURY - FISH CONSUMPTION ADVISORY. 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 West Baton Rouge Parish?
EPA's Water Quality Portal records 2,426 measurements from 20 monitoring sites in West Baton Rouge Parish over the past five years. The most frequently measured characteristic groups are Physical, Organics, Other, Nutrient. 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 West Baton Rouge Parish right now?
West Baton Rouge Parish's primary USGS streamgage on the Mississippi River is currently reading 569,000 cubic feet per second — 98% of the long-term mean of 578,205.88 cfs. Flow is within typical range for this gauge. For genuine real-time data, visit waterdata.usgs.gov.
How does West Baton Rouge Parish water compare to the Louisiana average?
West Baton Rouge Parish's SDWIS water quality score of 65.3/100 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 West Baton Rouge Parish?
Based on EPA SDWIS data, West Baton Rouge Parish has a water quality grade of B (65.3/100). This indicates good to excellent water quality with strong SDWIS compliance. 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 West Baton Rouge Parish have clean drinking water?
West Baton Rouge Parish has 1 health-based drinking water violation according to EPA records. With a water quality score of 65.3/100 and grade B, 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 West Baton Rouge Parish rank for water quality in Louisiana?
West Baton Rouge Parish ranks #10 out of 63 counties in Louisiana by SDWIS water quality score (1 = best). With a score of 65.3/100, it falls in the top 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

Orleans Parish

Louisiana

B

65.8

Water score

West Feliciana Parish

Louisiana

B

62.8

Water score

Jefferson Parish

Louisiana

B

69.0

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, 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.

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 Logan Johnson, Founder & Data EditorUpdated Reviewed by Logan Johnson, Founder & Data Editor

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