Mosca, CO Water Safety: 53/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Mosca ranks below average for tap water safety in CO — health-based violations are documented across multiple service areas in recent EPA monitoring data.
How Mosca Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Mosca Water
- Homes built before 1986: 44% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 11.59.
Who Supplies Your Water in Mosca
Because residential water in Mosca, CO flows primarily through a single utility, infrastructure decisions, rate-setting, and EPA compliance are all managed within one organizational structure. Federal records show 1 system active in the area, but one provider dominates the service landscape for most homes and apartments.
Overview
We track water quality and home safety data for 1 ZIP code in Mosca, Colorado (population ~779), covering 1 community water system serving approximately 11,271 people region-wide.
No EPA violations recorded across any ZIP codes in Mosca — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Mosca: D (53/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Mosca water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Mosca
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 81146 | D | ALAMOSA CITY OF | 11,271 |
All ZIP Codes in Mosca
- 81146 [D]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Mosca
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Housing & Infrastructure in Mosca
With 44% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
With a median build year of 1980, Mosca's housing stock reflects a city built across multiple eras. A substantial share of homes predate 1986 — the year lead solder in plumbing was federally banned — meaning the risk from plumbing materials is unevenly distributed across the city's neighborhoods and property types.
Most homes in Mosca were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Mosca Homeowners
Given current Mosca valuations, the remediation-to-property-value ratio is low — most homeowners are looking at a proportionally modest share that fits within routine financial planning.
Remediation costs in Mosca are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 50% below the Colorado average.
Lead Exposure Risk for Children in Mosca
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
When older housing represents 44% of the local inventory or aggregate readings approach the federal action level, an in-home check becomes the standard way to translate citywide averages into the specific reality of an individual Mosca address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Mosca
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 44% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Mosca, CO