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Public water system record

Intracoastal Water System West

Serves an area of Iberville Parish, LA that includes Crescent · 6,489 people served

Federal records show 15 health-based violations and 2 monitoring/reporting issues for Intracoastal Water System West in the last ten years. The most serious issue in this window was a Interim Enhanced Surface Water Treatment Rule violation that EPA lists as archived, not resolved.

  • LA1047002
  • PLAQUEMINE
  • LA
  • 6,489 served

System profile

Source water Surface water
ZIP 70765
EPA system ID LA1047002

Verify this system on EPA ECHO →

Health-based violations, last 10 years
15
Resolved
14
Unresolved
0
Archived by EPA
1
Any acute record
Yes
Monitoring issues, last 10 years
2

Key facts

  • Intracoastal Water System West draws water from 1 surface water intake.
  • Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.084 mg/L, federal limit 0.06 mg/L (1.4 times the limit), 2023.
  • Most recent formal enforcement: compliance order (no penalty) by Louisiana, June 2023.
  • Record on file since 1991, with 3 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 2,688 unknown out of 2,689 service lines.

Check whether Intracoastal Water System West serves your address

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Dec 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
 220 Jul 1, 2023 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2023 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
 220 Apr 1, 2023 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Feb 1, 2023 Resolved Yes
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
 220 Jan 1, 2023 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2023 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Jan 1, 2023 Resolved Yes
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Jan 1, 2023 Resolved Yes
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Dec 1, 2022 Resolved Yes
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Dec 1, 2022 Resolved Yes
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 220 Oct 1, 2022 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Jul 1, 2021 Resolved No
Surface Water Treatment Rule
Treatment technique failure
 120 Oct 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 84 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Oct 1, 2017 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Chlorite
Monitoring and reporting
 Dec 1, 2022 Resolved
Chlorite
Monitoring and reporting
 Nov 1, 2022 Resolved

Full record since 1991

EPA's records for Intracoastal Water System West go back to 1991. Before October 19, 2016 they list 3 health-based violations (3 archived by EPA without a recorded fix) and 4 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 2 1
2000s 1 2
2010 to October 18, 2016 0 1
October 19, 2016 to 2019 2 0
2020s 13 2

Most recent health-based violation before October 19, 2016: Total Coliform, began May 2003, Archived.

Show all 3 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 May 1, 2003 Archived
Total Coliform
Contaminant limit exceeded
 Sep 15, 1996 Archived
Total Coliform (acute)
Contaminant limit exceeded
 May 15, 1991 Archived

Enforcement actions

Louisiana regulators took 1 formal enforcement action against Intracoastal Water System West in 2023. The most recent was a compliance order (no penalty) in June 2023.

Date By Action Violations covered
Jun 8, 2023 Louisiana Compliance order (no penalty) 8 violations (8 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)

What the violations mean

Interim Enhanced Surface Water Treatment Rule

6 incidents

The system did not meet a filtration or treatment requirement for surface water

Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through

Haloacetic Acids (HAA5)

5 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Total Trihalomethanes (TTHMs)

3 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Surface Water Treatment Rule

1 incident

The system did not complete a treatment step or action that the Surface Water Treatment Rule requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Intracoastal Water System West draws water from 1 surface water intake. It also has an emergency connection to Intracoastal Water System East. 2 other public water systems have emergency connections to Intracoastal Water System West.

Emergency or part-time connections to

Annual water quality report

Intracoastal Water System West must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Louisiana.

Certified drinking water labs by state EPA guidance for private wells