City of Columbus
EPA ID: TX0450001 · 3,739 people served · 5 ZIP codes
Looking at the EPA enforcement file for City of Columbus, 3 violations are listed as unresolved — those findings cover the utility's service area of approximately 3,739 people and remain open in the federal compliance system, awaiting formal corrective action documentation.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for City of Columbus Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The City of Columbus serves a community with a median household income of $72,879 and an estimated 14,169 residents across its service area. Approximately 55% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 39% 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?
City of Columbus'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 1% of homes in Austin County, Texas 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 City of Columbus compares to EPA limits
What This Means For You
Stage 1 DBP Rule at 6 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 5 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 3 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Revised Total Coliform Rule at 2 presence exceeds the EPA maximum of presence.
Comparable Water Systems
Similar-sized systems in Texas
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
CITY OF COLUMBUS (EPA ID: TX0450001) is a community water system in Texas that serves approximately 3,739 people from groundwater sources.
This system provides water to 5 ZIP codes across 5 communities.
Average Home Safety Score: B (79/100)
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 | Stage 1 DBP Rule | Monitoring | Unresolved |
| May 1, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| March 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| February 6, 2025 | Lead and Copper Rule | Monitoring | Resolved |
| December 30, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Resolved |
| October 1, 2024 | Stage 1 DBP Rule | Monitoring | Unresolved |
| December 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| April 1, 2023 | Revised Total Coliform Rule | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Failure | 6 | No |
| Lead and Copper Rule | Treatment Failure | 5 | No |
| Consumer Confidence Report Rule | Reporting Failure | 3 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Revised Total Coliform Rule | Microbiological | 2 | No |
| Total Coliform | Microbiological | 1 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 78934 | 0.002 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: 2 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 3 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Columbus (TX0450001) on EPA.gov.
Frequently Asked Questions
Is City of Columbus water safe to drink?
City of Columbus has recorded 1 health-based violation 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 City of Columbus serve?
City of Columbus serves approximately 3,739 people across 5 ZIP codes in Texas.
Where does City of Columbus get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
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.
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
City of Columbus (EPA ID: TX0450001) — request the latest Consumer Confidence Report or ask about specific contaminants.