CITY REPORT CA

Rio Oso, CA Home Safety Data by ZIP

1 ZIP code · 0 water systems · Updated

Data: EPA SDWIS

1
ZIP Codes
0
Water Systems
N/A
ZIPs with Violations
Zone 2
Radon Risk (Moderate)
$593K
Median Home Value
$1,600
Est. Remediation (0.3% of home value)

Key Facts for Rio Oso Residents

  • Homes built before 1986: 65% - older plumbing may contain lead solder.
  • Estimated remediation: $1,600 per household.
  • CDC health risk index: 12.28 - above typical levels.

Overview

We track home safety data for 1 ZIP code in Rio Oso, California, covering 0 community water system serving approximately 992 people. The EPA snapshots used for this build directly map water systems to 0 of 1 ZIP codes.

EPA water-system violation data is unavailable in the dataset used for this page for the tracked ZIP codes in Rio Oso.

Lead & Copper

  • Lead data: not yet available for Rio Oso
  • Lead action-level status: not available

Radon Risk

Dominant radon zone: Zone 2 (Moderate Risk)

The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.

All ZIP Codes in Rio Oso

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Rio Oso Community Health Snapshot

10%
Asthma (US: 9.8%)
12.8%
Diabetes (US: 10.4%)
17.9%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.

Compared to National Average

Asthma 10% ↑
Diabetes 12.8% ↑
Mental Health 17.9% ↑

Vertical line = national average. Above national · Below national

Rio Oso Infrastructure Age

1973
Median Build Year
65%
Built Before 1986
28%
Built Before 1970
Copper
Likely Pipe Material

With 65% 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

The character of Rio Oso's housing stock is one of deep historical layering - a median build year of 1973 signals a city built largely before the plumbing era changes of 1986 and 1970. Lead-soldered copper joints and, in the oldest properties, lead service lines are commonly present in this inventory. That context shapes what individual water testing may reveal, particularly in neighborhoods where the oldest housing is concentrated.

1973
Median Year Built
65%
Pre-1986 (Lead Paint Risk)
28%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (28%) 1970–1986 (37%) Post-1986 (35%)

Over half of homes in Rio Oso were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.

Source: U.S. Census Bureau ACS B25034.

How Remediation Costs Compare in Rio Oso

In Rio Oso, the equity impact of remediation is proportionally small - not the kind of financial commitment that rises to the level of a genuine planning constraint, but a minor share of what most properties here are worth.

Median Home Value
$593,300
Est. Remediation
$1,600
Remediation as % of home value 0.3%

Remediation costs in Rio Oso are relatively low compared to home values. The $800–$2,600 estimated range is a small fraction of median property value. Home values are 20% below the California average.

Rio Oso: Lead Risk & Vulnerable Populations

65%
Homes Built Before 1986

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.

65% - that captures the slice of Rio Oso housing dating from before the federal ban on solder containing lead. It pairs with aggregate utility readings that either approach or cross 0.015 mg/L, the benchmark set under the EPA Lead and Copper Rule. Together, the two figures shift one-home reads into a standard household-level confirmation, particularly for families with kids. A certified lead-removal filter is available through retailer-verified channels if a kit returns results that warrant additional measures.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Rio Oso: NFIP Claim Records and Water-Quality Context

5
Total FEMA Flood Claims
$9,739
Avg Reported Sum With Payment Data
0%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Rio Oso contains 5 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $9,739. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The <strong>$1,600</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.

Frequently Asked Questions

How much does it cost to fix water issues in Rio Oso?
Estimated remediation costs in Rio Oso average $1,600 per household, ranging from $800 to $2,600. Costs include filtration, pipe replacement, radon mitigation, and flood protection.
HomeCitiesCalifornia → Rio Oso, CA

How to cite this page

APA ZipCheckup. (2026). Rio Oso, CA Home Safety Data by ZIP. https://zipcheckup.com/cities/ca/rio-oso/
BibTeX
@misc{zipcheckup-cities-ca-rio-oso,
  author = {{ZipCheckup}},
  title  = {{Rio Oso, CA Home Safety Data by ZIP}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/ca/rio-oso/}
}

Page version: August 2026.

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