Southwest Metropolitan Water Supply District
EPA ID: CO0103723 · 48,648 people served · 18 ZIP codes
Zero violations in five consecutive years of EPA monitoring — Southwest Metropolitan Water Supply District has held a clean track record across every reporting cycle in that span, with no enforcement activity of any kind on file for the full service population of 48,648 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 6 (2021) to 3 (2024). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Southwest Metropolitan Water Supply District Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Southwest Metropolitan Water Supply District serves a community with a median household income of $131,531 and an estimated 341,421 residents across its service area. Approximately 44% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Southwest Metropolitan Water Supply District's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 1% of homes in Arapahoe County, Colorado rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 62th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 26 detections recorded. 1 exceeds federal EPA limits (4 ppt for PFOA/PFOS).
Comparable Water Systems
Similar-sized systems in Colorado
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
Southwest Metropolitan Water Supply District (EPA ID: CO0103723) is a community water system in Colorado that serves approximately 48,648 people from surface water sources.
This system provides water to 18 ZIP codes across 3 communities.
Average Home Safety Score: C (65/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 80120 | 0.005 mg/L | No | N/A |
| 80122 | 0.005 mg/L | No | N/A |
| 80123 | 0.005 mg/L | No | N/A |
| 80125 | 0.005 mg/L | No | N/A |
| 80127 | 0.005 mg/L | No | N/A |
| 80128 | 0.005 mg/L | No | N/A |
| 80129 | 0.005 mg/L | No | N/A |
| 80130 | 0.005 mg/L | No | N/A |
| 80160 | 0.005 mg/L | No | N/A |
| 80161 | 0.005 mg/L | No | N/A |
| 80162 | 0.005 mg/L | No | N/A |
| 80163 | 0.005 mg/L | No | N/A |
| 80165 | 0.005 mg/L | No | N/A |
| 80166 | 0.005 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High 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: 6 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 12 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.
- 80120 — Littleton
- 80121 — Littleton
- 80122 — Littleton
- 80123 — Littleton
- 80124 — Lone Tree
- 80125 — Littleton
- 80126 — Littleton
- 80127 — Littleton
- 80128 — Littleton
- 80129 — Littleton
- 80130 — Littleton
- 80131 — Louviers
- 80160 — Littleton
- 80161 — Littleton
- 80162 — Littleton
- 80163 — Littleton
- 80165 — Littleton
- 80166 — Littleton
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Southwest Metropolitan Water Supply District (CO0103723) on EPA.gov.
Frequently Asked Questions
Is Southwest Metropolitan Water Supply District water safe to drink?
Based on EPA records, Southwest Metropolitan Water Supply District has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Southwest Metropolitan Water Supply District serve?
Southwest Metropolitan Water Supply District serves approximately 48,648 people across 18 ZIP codes in Colorado.
Where does Southwest Metropolitan Water Supply District get its water?
The primary water source is surface water.
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
Southwest Metropolitan Water Supply District (EPA ID: CO0103723) — request the latest Consumer Confidence Report or ask about specific contaminants.