Lead in Maricopa, AZ Drinking Water
Lead data for Maricopa, Arizona · 71,864 residents · 4 ZIP codes
ZipCheckup's reading of Lead in Maricopa, Arizona: the highest detected level is 0.8 ppb; the EPA limit is 15 ppb (action level). Lead carries a high health-risk designation.
EPA records show Lead detections in Maricopa, Arizona water samples.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13
Lead in Maricopa Tap Water
Lead has been detected in Maricopa, Arizona drinking water at a maximum level of 0.8 ppb — below the EPA action level of 15 ppb (action level).
This analysis covers 71,864 residents across 4 ZIP codes in Maricopa.
Maricopa's overall water quality grade is C (56/100).
Is Lead in Maricopa Water Safe?
If you live in an affected ZIP code, consider installing a reverse osmosis or nsf 53 carbon block filter certified under NSF 53 / NSF 58 and testing your water independently.
Lead Levels by ZIP Code
| ZIP Code | Lead Level | EPA Limit | Status |
|---|---|---|---|
| 85138 | 0.8 ppb | 15 ppb (action level) | OK |
| 85139 | 0.8 ppb | 15 ppb (action level) | OK |
| 85238 | 0.8 ppb | 15 ppb (action level) | OK |
| 85239 | 0.8 ppb | 15 ppb (action level) | OK |
Average lead level across Maricopa: 0.8 ppb
EPA Violations for Lead in Maricopa
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2025-10-01 | Lead (Known) | Known | 85139 |
| 2025-07-01 | Lead (Known) | Known | 85139 |
| 2025-04-01 | Lead (Known) | Known | 85139 |
| 2025-01-01 | Lead (Known) | Known | 85139 |
| 2024-10-01 | Lead (Known) | Known | 85139 |
| 2024-07-01 | Lead (Known) | Known | 85139 |
| 2024-04-01 | Lead (Known) | Known | 85139 |
| 2024-01-01 | Lead (Known) | Known | 85139 |
| 2023-10-01 | Lead (Known) | Known | 85139 |
| 2023-07-01 | Lead (Known) | Known | 85139 |
| 2023-04-01 | Lead (Known) | Known | 85139 |
| 2023-01-01 | Lead (Known) | Known | 85139 |
| 2022-10-01 | Lead (Known) | Known | 85139 |
| 2022-07-01 | Lead (Known) | Known | 85139 |
Health Effects of Lead
- Brain development delays and reduced IQ in children
- Behavioral problems and learning disabilities
- High blood pressure and kidney damage in adults
- Increased risk of premature birth in pregnant women
Health risk severity: High. Governed by the Lead and Copper Rule Revisions (LCRR/LCRI).
How Lead Gets Into Drinking Water
- Corrosion of lead service lines (pipes connecting water main to home)
- Lead solder in copper plumbing joints (pre-1986 homes)
- Brass fixtures and faucets manufactured before 2014
- Stagnant water that sits in lead-containing pipes overnight
What to Do About Lead in Maricopa Water
- Install an NSF 53 or NSF 58 certified filter at kitchen sink
- Run cold water for 30 seconds before using for drinking or cooking
- Use cold water only for cooking and preparing formula
- Consider whole-home reverse osmosis if lead service line is present
Look for filters certified under NSF 53 / NSF 58 for lead removal.