Public water system record
Southwest Ouachita Waterworks, Inc
Serves an area of Ouachita Parish, LA · 10,725 people served
Federal records show 25 health-based violations and no monitoring/reporting issues for Southwest Ouachita Waterworks, Inc in the last ten years. The most serious issue in this window was a Total Trihalomethanes (TTHMs) violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 25
- Resolved
- 21
- Unresolved
- 0
- Archived by EPA
- 4
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Southwest Ouachita Waterworks, Inc draws water from 6 wells.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 260 µg/L, federal limit 80 µg/L (3.3 times the limit), 2016.
- Most recent formal enforcement: compliance order (no penalty) by Louisiana, February 2018.
- Record on file since 1992, with 28 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 3 unknown out of 4,161 service lines.
Check whether Southwest Ouachita Waterworks, Inc serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Oct 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jul 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Apr 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jul 1, 2020 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 24, 2020 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 24, 2020 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Apr 1, 2019 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jan 1, 2019 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.117 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
|
220 | Oct 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.075 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
220 | Oct 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 84 µg/L, federal limit 60 µg/L (1.4 times the limit)
|
220 | Jul 1, 2018 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 136 µg/L, federal limit 80 µg/L (1.7 times the limit)
|
220 | Jul 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 66 µg/L, federal limit 60 µg/L (1.1 times the limit)
|
220 | Apr 1, 2018 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 203 µg/L, federal limit 80 µg/L (2.5 times the limit)
|
220 | Apr 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 81 µg/L, federal limit 60 µg/L (1.4 times the limit)
|
220 | Jan 1, 2018 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 246 µg/L, federal limit 80 µg/L (3.1 times the limit)
|
220 | Jan 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 73 µg/L, federal limit 60 µg/L (1.2 times the limit)
|
220 | Oct 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 257 µg/L, federal limit 80 µg/L (3.2 times the limit)
|
220 | Oct 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 244 µg/L, federal limit 80 µg/L (3.1 times the limit)
|
220 | Jul 1, 2017 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 65 µg/L, federal limit 60 µg/L (1.1 times the limit)
|
220 | Jul 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 242 µg/L, federal limit 80 µg/L (3 times the limit)
|
220 | Apr 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 257 µg/L, federal limit 80 µg/L (3.2 times the limit)
|
220 | Jan 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 260 µg/L, federal limit 80 µg/L (3.3 times the limit)
|
220 | Oct 1, 2016 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 61 µg/L, federal limit 60 µg/L (at or just above the limit)
|
220 | Oct 1, 2016 | Resolved | No |
Full record since 1992
EPA's records for Southwest Ouachita Waterworks, Inc go back to 1992. Before October 19, 2016 they list 28 health-based violations (17 resolved, 11 archived by EPA without a recorded fix) and 2 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 9 | 0 |
| 2000s | 10 | 2 |
| 2010 to October 18, 2016 | 9 | 0 |
| October 19, 2016 to 2019 | 16 | 0 |
| 2020s | 7 | 0 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2016, Resolved.
Show all 28 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 260 µg/L, federal limit 80 µg/L (3.3 times the limit)
|
Oct 1, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 61 µg/L, federal limit 60 µg/L (at or just above the limit)
|
Oct 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 267 µg/L, federal limit 80 µg/L (3.3 times the limit)
|
Jul 1, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 61 µg/L, federal limit 60 µg/L (at or just above the limit)
|
Jul 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 255 µg/L, federal limit 80 µg/L (3.2 times the limit)
|
Apr 1, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 64 µg/L, federal limit 60 µg/L (1.1 times the limit)
|
Apr 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 251 µg/L, federal limit 80 µg/L (3.1 times the limit)
|
Jan 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 126 µg/L, federal limit 80 µg/L (1.6 times the limit)
|
Oct 1, 2015 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2011 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 92 µg/L, federal limit 80 µg/L (1.2 times the limit)
|
Jul 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 137 µg/L, federal limit 80 µg/L (1.7 times the limit)
|
Apr 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 211 µg/L, federal limit 80 µg/L (2.6 times the limit)
|
Jan 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 213 µg/L, federal limit 80 µg/L (2.7 times the limit)
|
Oct 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jul 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Apr 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 15, 2001 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jul 15, 2000 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Aug 15, 1999 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jul 15, 1997 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Mar 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Aug 15, 1995 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
May 15, 1995 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Aug 15, 1993 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jun 15, 1993 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Dec 15, 1992 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1992 | Archived |
Enforcement actions
Louisiana regulators took 2 formal enforcement actions against Southwest Ouachita Waterworks, Inc between 2006 and 2018. The most recent was a compliance order (no penalty) in February 2018.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 20, 2018 | Louisiana | Compliance order (no penalty) | 25 violations (25 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
| Mar 13, 2006 | Louisiana | Compliance order (no penalty) | 9 violations (8 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
What the violations mean
Total Trihalomethanes (TTHMs)
16 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Haloacetic Acids (HAA5)
7 incidentsHaloacetic acid byproducts exceeded the federal limit
Long-term exposure to HAAs may increase cancer risk
Groundwater Rule
2 incidentsThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Southwest Ouachita Waterworks, Inc draws water from 6 wells. It also has an emergency connection to Cadeville Water District. 2 other public water systems have emergency connections to Southwest Ouachita Waterworks, Inc.
Emergency or part-time connections to
- Cadeville Water District West Monroe, LA
Annual water quality report
Southwest Ouachita Waterworks, Inc 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.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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