Town of Olla Water System
EPA ID: LA1059004 · 2,565 people served · 3 ZIP codes
In the current EPA monitoring period, Town of Olla Water System has 20 violations still listed as unresolved, with the utility supplying water to approximately 2,565 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 4 (2021) to 8 (2025). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Town of Olla Water System Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The Town of Olla Water System serves a community with a median household income of $66,250 and an estimated 5,375 residents across its service area. Approximately 66% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 92% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Town of Olla Water System's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 0% of homes in Caldwell Parish, Louisiana rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Town of Olla Water System compares to EPA limits
What This Means For You
Haloacetic Acids (HAA5) at 16 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Total Trihalomethanes (TTHM) at 4 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Lead and Copper Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Haloacetic Acids (HAA5) was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
Similar-sized systems in Louisiana
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Town of Olla Water System (EPA ID: LA1059004) is a community water system in Louisiana that serves approximately 2,565 people from groundwater sources.
This system provides water to 3 ZIP codes across 3 communities.
Average Home Safety Score: B (82/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| April 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| January 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| November 6, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 1, 2024 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| July 31, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| July 1, 2024 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| April 1, 2024 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| January 1, 2024 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| December 2, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| October 1, 2023 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| July 1, 2023 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| May 1, 2023 | Total Trihalomethanes (TTHM) | Monitoring | Unresolved |
| April 1, 2023 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| January 1, 2023 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 16 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 4 | Yes |
| Lead and Copper Rule | Treatment Failure | 2 | No |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
| Stage 2 DBP Rule | Treatment Failure | 1 | Yes |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
Health Risk Details
Haloacetic Acids (HAA5) (EPA limit: 0.06 mg/L)
Cancer risk; reproductive & developmental effects At-risk groups: pregnant women, infants, long-term consumers of chlorinated municipal water.
Removal methods: granular activated carbon (GAC), carbon block filter, reverse osmosis. Find the right filter →
Total Trihalomethanes (TTHM) (EPA limit: 0.08 mg/L)
Bladder & rectal cancer risk; reproductive concerns At-risk groups: pregnant women, long-term consumers of chlorinated water, people who frequently shower in chlorinated water.
Removal methods: granular activated carbon (GAC), carbon block filter, point-of-entry aeration. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 71465 | 0.001 mg/L | No | N/A |
| 71479 | 0.001 mg/L | No | N/A |
| 71480 | 0.001 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by LA or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Town of Olla Water System (LA1059004) on EPA.gov.
Frequently Asked Questions
Is Town of Olla Water System water safe to drink?
Town of Olla Water System has recorded 19 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Town of Olla Water System serve?
Town of Olla Water System serves approximately 2,565 people across 3 ZIP codes in Louisiana.
Where does Town of Olla Water System get its water?
The primary water source is groundwater.
Contact Your Water Utility
Public-record contact information for the water utility serving this system. Use these channels to request water quality reports, ask about service, or report issues directly.
Contact information from Town of Olla Water System Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility, does not act as its agent, and does not provide customer support for it. Contact details shown are public-record information from CCR filings. For service issues, contact the utility directly using the information above.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: Town of Olla Water System Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Notable events and violations
This section summarizes events the utility chose to disclose in its most recent Consumer Confidence Report, plus any federal compliance violations the utility recorded against itself. Both lists are utility-authored — ZipCheckup does not audit, judge, or reorder them.
Notable events from the utility's CCR
These bullet entries are the utility's own narration of operational, regulatory, or infrastructure events during the reporting period.
- TTHM highest LRAA 45 ppb
- Sodium 303.6 mg/L and Sulfate 243 mg/L — high mineral content
ZipCheckup note: items above reflect what the utility published in its most recent CCR. Federal violation records are also tracked separately by the EPA Safe Drinking Water Information System (SDWIS) — the SDWIS record is the authoritative federal source for any specific regulatory action.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Town of Olla Water System (EPA ID: LA1059004) — request the latest Consumer Confidence Report or ask about specific contaminants.