Mount Lemmon, AZ: 7 Violations — 75/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
For households in Mount Lemmon, AZ water data shows a consistently above-average safety picture.
How Mount Lemmon Compares
Data: EPA SDWIS Last verified: 2026-06-03
Mount Lemmon Water: The Quick Version
- Your city's water systems recorded 7 violations in the past 5 years.
- Average lead level: 0.0057 mg/L.
- Homes built before 1986: 46% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 12.22 — above typical levels.
Water Systems Serving Mount Lemmon
2 water utilities share the residential service territory in Mount Lemmon, AZ — out of 2 total systems in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in Mount Lemmon, Arizona (population ~22), covering 2 community water systems serving approximately 18,422 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Mount Lemmon: B (75/100)
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
Mount Lemmon water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0057 mg/L (EPA action level: 0.015 mg/L)
- 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.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 4 | 1 |
| Consumer Confidence Report Rule | Reporting | 4 | 1 |
| Stage 1 DBP Rule | Treatment Technique | 2 | 1 |
| Surface Water Treatment Rule | Treatment Technique | 2 | 1 |
| Lead and Copper Rule | Treatment Technique | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 85619 | B | 7 | 0 | Mt Lemmon Dwid |
All ZIP Codes in Mount Lemmon
- 85619 [B] — 7 violations
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.
CDC Health Data for Mount Lemmon
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
Key Contaminants Detected in Mount Lemmon
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Mount Lemmon's Housing Stock?
With 46% 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
Reading the housing data for Mount Lemmon, with a median build year of 1981, reveals a community where neither old nor new construction dominates. That balanced profile means lead-solder-era plumbing is present throughout a meaningful portion of the residential inventory — with risk concentrated in properties built before 1986 and most acute in those that predate 1970.
A significant portion of Mount Lemmon's housing stock predates 1970, when lead pipes were commonly used. Residents in older homes should consider water testing.
Source: U.S. Census Bureau ACS B25034.
Protecting Children from Lead in Mount Lemmon
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.
Wherever 46% of local housing was built before solder rules changed — as is the case in Mount Lemmon — a faucet-level sample closes the gap that aggregate utility data cannot.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Mount Lemmon, AZ