ZipCheckup grade for 93458: C.
A mixed picture - some signals here are worth your attention.
Your top priority: test this home for radon. Check your ZIP → EPA radon map
Santa Maria, CA (93458): High Radon Potential Area - 58/100
EPA data for City of Santa Maria Utilities Department
EPA records for the water systems mapped to 93458 in Santa Maria, CA contain zero recorded violations for inclusive record years 2021 through 2026. This does not establish that every category was monitored or published, and it does not cover events outside that source window.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water No drinking-water violations in EPA records since 2021.
- Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
- Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.
- Flood 8 cumulative NFIP claim records. Claim evidence is historical, not current map coverage.
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Score Breakdown
Overall Home Safety Score: 58/100
This is the published model score. Component and domain values are shown independently; they are not added together on this page.
Canonical components
Required domains
Coverage: 4 of 4 components and 3 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (7) HIGH
Your Water System
ZIP code 93458 in Santa Maria, California is mapped to the water system City of Santa Maria Utilities Department (EPA ID: CA4210011). This system provides water to approximately 109,477 people from surface water sources.
Other Water Quality Reports in California
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- 90009 (Los Angeles)
- 90010 (Los Angeles)
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- 90013 (Los Angeles)
- 90014 (Los Angeles)
- 90015 (Los Angeles)
- 90016 (Los Angeles)
- 90017 (Los Angeles)
- 90018 (Los Angeles)
- 90019 (Los Angeles)
- 90020 (Los Angeles)
Nearby Water Quality Reports
- 93456 (Santa Maria) - 3 mi
- 93457 (Santa Maria) - 3 mi
- 93454 (Santa Maria) - 4 mi - 14 violations recorded for mapped water systems
- 93434 (Guadalupe) - 4 mi
- 93444 (Nipomo) - 5 mi - 13 violations recorded for mapped water systems
- 93429 (Casmalia) - 8 mi
- 93455 (Santa Maria) - 9 mi - 46 violations recorded for mapped water systems
- 93445 (Oceano) - 12 mi - 37 violations recorded for mapped water systems
- 93475 (Oceano) - 12 mi
- 93421 (Arroyo Grande) - 13 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for City of Santa Maria Utilities Department (CA4210011) on EPA.gov.
4 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
UCMR 5 PFAS monitoring: no reportable detections in available records
Available federal UCMR5 records for water systems mapped to ZIP code 93458 show no PFAS detections among the compounds tested, at the program's reporting levels.
The EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5) required community and non-transient non-community water systems serving 3,300 or more people to test for 29 PFAS compounds and lithium between 2023 and 2025. Systems with no detections at the federal minimum reporting level had no results at or above that reporting level.
Environmental Hazards (11) HIGH
Home & Infrastructure (6) MODERATE
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Santa Maria
Based on local data for ZIP 93458, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Home & Flood Insurance
The ZIP code for this report in Santa Maria has 8 FEMA flood claims on record. Standard homeowner policies don't cover flood damage - make sure you're protected.
Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote
Check Your Flood Zone (Free)FEMA flood map lookup - see if your property is in a flood zone
Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)
Gutter Installation & Repair
The median home in 93458 was built around 1988. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.
Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home
Estimate Your Home Maintenance CostsService recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
Frequently Asked Questions
Is the tap water in 93458 safe to drink?
EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 93458 (primary system: City of Santa Maria Utilities Department), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 93458's water come from?
The recorded water source for City of Santa Maria Utilities Department, a system mapped to ZIP code 93458, is Surface water. This system serves approximately 109,477 people.
How does Santa Maria water compare to the national average?
Santa Maria's Home Safety Score ranks lower than 85% of U.S. ZIP codes, and lower than 95% of ZIP codes within California.
How can I get my water tested in Santa Maria?
If City of Santa Maria Utilities Department supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
What is the radon risk for 93458?
93458 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Santa Barbara County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
What does the NFIP claim history show for ZIP 93458?
FEMA records contain 8 flood insurance claims filed in ZIP code 93458; the recorded rated-zone value (the most frequent one if there are several claims) is A, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.
How to cite this page
ZipCheckup. (2026). Santa Maria, CA (93458): High Radon Potential Area - 58/100. https://zipcheckup.com/report/93458/
@misc{zipcheckup-report-93458,
author = {{ZipCheckup}},
title = {{Santa Maria, CA (93458): High Radon Potential Area - 58/100}},
year = {2026},
url = {https://zipcheckup.com/report/93458/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 93458
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 93456 | Santa Maria, CA | 3.4 mi | N/A | 0 |
| 93457 | Santa Maria, CA | 3.4 mi | N/A | 0 |
| 93454 | Santa Maria, CA | 3.6 mi | C | 14 |
| 93434 | Guadalupe, CA | 4.2 mi | C | 0 |
| 93444 | Nipomo, CA | 5.3 mi | B | 13 |
| 93429 | Casmalia, CA | 7.8 mi | N/A | 0 |
| 93455 | Santa Maria, CA | 9.5 mi | D | 46 |
| 93445 | Oceano, CA | 12.1 mi | B | 37 |
| 93475 | Oceano, CA | 12.1 mi | N/A | 0 |
| 93421 | Arroyo Grande, CA | 12.6 mi | N/A | 0 |
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