City of Columbia Utilities
EPA ID: MO3010181 · 126,254 people served · 15 ZIP codes
Federal water data for City of Columbia Utilities logs 1 historical violation — all addressed and cleared, leaving the utility in current compliance for 126,254 people.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for City of Columbia Utilities Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The City of Columbia Utilities serves a community with a median household income of $80,392 and an estimated 175,028 residents across its service area. Approximately 45% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
City of Columbia Utilities'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 Boone County, Missouri rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Wastewater Proximity Note: This service area ranks in the 78th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
Detected Contaminants
How City of Columbia Utilities compares to EPA limits
What This Means For You
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 7 detections recorded.
Comparable Water Systems
Similar-sized systems in Missouri
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 Columbia Utilities (EPA ID: MO3010181) is a community water system in Missouri that serves approximately 126,254 people from groundwater sources.
This system provides water to 15 ZIP codes across 5 communities.
Average Home Safety Score: B (80/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
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 | 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 |
|---|---|---|---|
| 65201 | 0.0021 mg/L | No | N/A |
| 65202 | 0.0021 mg/L | No | N/A |
| 65203 | 0.0021 mg/L | No | N/A |
| 65205 | 0.0021 mg/L | No | N/A |
| 65211 | 0.0021 mg/L | No | N/A |
| 65212 | 0.0021 mg/L | No | N/A |
| 65215 | 0.0021 mg/L | No | N/A |
| 65216 | 0.0021 mg/L | No | N/A |
| 65217 | 0.0021 mg/L | No | N/A |
| 65218 | 0.0021 mg/L | No | N/A |
| 65299 | 0.0021 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
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: 8 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 7 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.
- 65201 — Columbia
- 65202 — Columbia
- 65203 — Columbia
- 65205 — Columbia
- 65211 — Columbia
- 65212 — Columbia
- 65215 — Columbia
- 65216 — Columbia
- 65217 — Columbia
- 65218 — Columbia
- 65240 — Centralia
- 65255 — Hallsville
- 65256 — Harrisburg
- 65279 — Rocheport
- 65299 — Columbia
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Columbia Utilities (MO3010181) on EPA.gov.
Frequently Asked Questions
Is City of Columbia Utilities water safe to drink?
City of Columbia Utilities has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does City of Columbia Utilities serve?
City of Columbia Utilities serves approximately 126,254 people across 15 ZIP codes in Missouri.
Where does City of Columbia Utilities 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 CITY OF COLUMBIA UTILITIES 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: CITY OF COLUMBIA UTILITIES Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
The Department of Natural Resources conducted a source water assessment to determine the susceptibility of our water source to potential contaminants. This process involved the establishment of source water area delineations for each well or surface water intake and then a contaminant inventory was performed within those delineated areas to assess potential threats to each source.
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:
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.
Aesthetic water quality
These measurements describe the look, taste, and feel of the water this utility delivers. They are not contaminant violations — they sit alongside federal Secondary Maximum Contaminant Levels (SMCLs) which the EPA publishes as non-enforceable guidance.
Aesthetic measurements from CITY OF COLUMBIA UTILITIES Consumer Confidence Report.
Aesthetic measurements are reported by the utility from its annual sampling. EPA Secondary MCLs are advisory thresholds — values outside them indicate aesthetic concerns such as taste or appearance, not health violations. Federal contaminant testing is shown in the sections above.
Hard water detected in CITY OF COLUMBIA UTILITIES
Your utility reported water hardness of 187 ppm CaCO₃ (10.9 grains per gallon) in its most recent Consumer Confidence Report. This is in the hard range and may cause scale buildup, reduced appliance lifespan, and dry skin or hair.
There are three common approaches to treating hard water: salt-based ion-exchange softeners (most effective, require salt refills), salt-free conditioners (lower maintenance, scale prevention only), and reverse osmosis at the kitchen sink (cooking and drinking water only). Aquasana, EcoWater, Pelican, and SpringWell are among the major US brands.
Paid Partner. ZipCheckup earns commission on Aquasana purchases. We do not test water or verify product effectiveness for specific hardness levels — manufacturer claims are theirs alone. Consult a certified water-quality professional for personalized advice.
Hardness data parsed from this utility's most recent Consumer Confidence Report. Severity bands per USGS hard water classification.
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
- #12 / 50 Highest Exposure Burden (Missouri)
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 Columbia Utilities (EPA ID: MO3010181) — request the latest Consumer Confidence Report or ask about specific contaminants.