CITY REPORT OR

Ontario, OR: 14 Violations - Home Safety Score unavailable

1 ZIP code · 2 water systems · Updated

Data: EPA SDWIS

1
ZIP Codes
2
Water Systems
1
ZIPs with Violations
Zone 2
Radon Risk (Moderate)
$221K
Median Home Value
$1,600
Est. Remediation (0.7% of home value)

Ontario Water: The Quick Version

  • Your city's water systems recorded 14 violations in the past 5 years.
  • Average lead level: 0.0021 mg/L.
  • Homes built before 1986: 71% - older plumbing may contain lead solder.
  • Estimated remediation: $1,600 per household.
  • CDC health risk index: 14.41 - above typical levels.

Water Systems Serving Ontario

Structurally, Ontario, OR's water supply is divided. Federal data identifies 2 water systems in the area, with 2 providers serving the bulk of residential connections. These utilities operate independently, meaning rate-setting authority and EPA compliance accountability are distributed rather than centralized.

Overview

We track home safety data for 1 ZIP code in Ontario, Oregon, covering 2 community water systems serving approximately 19,879 people. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.

1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.

Water Sources

Ontario water systems draw from: Groundwater, Surface water.

Lead & Copper

  • Average lead level (90th percentile): 0.0021 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 1 ZIP code with known status 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
E. coli Microbiological 8 1
Surface Water Treatment Rule Treatment Technique 6 1
Consumer Confidence Report Rule Reporting 6 1
Fecal Coliform Microbiological 4 1
Total Trihalomethanes (TTHM) Disinfection Byproducts 2 1

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
97914 14 0 City of Ontario,

All ZIP Codes in Ontario

Data Sources

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

CDC Health Data for Ontario

11.7%
Asthma (US: 9.8%)
13.9%
Diabetes (US: 10.4%)
18.9%
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 11.7% ↑
Diabetes 13.9% ↑
Mental Health 18.9% ↑

Vertical line = national average. Above national · Below national

Key Contaminants Detected in Ontario

E. coli 8 violations
Microbiological
Gastrointestinal illness, potentially fatal
Surface Water Treatment Rule 6 violations
Treatment Technique
Pathogens may not be adequately removed
Consumer Confidence Report Rule 6 violations
Reporting

Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.

How Old Is Ontario's Housing Stock?

1974
Median Build Year
71%
Built Before 1986
25%
Built Before 1970
Copper
Likely Pipe Material

With 71% 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

Lead solder was standard in copper plumbing until federally banned in 1986; lead pipes were common in service lines pre-1970. Ontario's median build year of 1974 reflects a housing stock where these older materials are a pervasive feature - not a rare legacy - of the residential plumbing landscape.

1974
Median Year Built
71%
Pre-1986 (Lead Paint Risk)
25%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (25%) 1970–1986 (46%) Post-1986 (29%)

Over half of homes in Ontario 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.

Ontario: Remediation Cost in Perspective

What does remediation cost in financial context for Ontario homeowners? Proportionally very little - the equity share here is low, and addressing documented issues is a manageable planning question rather than a material financial burden.

Median Home Value
$220,600
Est. Remediation
$1,600
Remediation as % of home value 0.7%

Remediation costs in Ontario are relatively low compared to home values. The $800–$2,600 estimated range is a small fraction of median property value. Home values are 46% below the Oregon average.

Protecting Children from Lead in Ontario

71%
Homes Built Before 1986
0.0021
mg/L Avg Lead (Limit: 0.015)

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.

After the federal action removing lead-bearing solder from new plumbing took effect, building practice shifted - but 71% of the Ontario inventory predates that line. With aggregate samples near or beyond 0.015 mg/L, an in-home check moves out of the optional column into the standard list.

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

Historical Flood-Claim Evidence for Ontario

20
Total FEMA Flood Claims
$7,213
Avg Reported Sum With Payment Data
100%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Ontario contains 20 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $7,213. Among ZIP codes with claim records, 100% 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 many water violations does Ontario have?
Ontario water systems have a total of 14 EPA violations. Violations are tracked across 1 ZIP code.
Does Ontario water have lead?
The average 90th-percentile lead level in Ontario is 0.0021 mg/L. This is below the EPA action level of 0.015 mg/L. Lead levels can vary by home - testing is recommended especially in older properties.
How many water systems serve Ontario?
Ontario is served by 2 public water systems across 1 ZIP code, serving approximately 19,879 people.
How much does it cost to fix water issues in Ontario?
Estimated remediation costs in Ontario average $1,600 per household, ranging from $800 to $2,600. Costs include filtration, pipe replacement, radon mitigation, and flood protection.
HomeCitiesOregon → Ontario, OR

How to cite this page

APA ZipCheckup. (2026). Ontario, OR: 14 Violations - Home Safety Score unavailable. https://zipcheckup.com/cities/or/ontario/
BibTeX
@misc{zipcheckup-cities-or-ontario,
  author = {{ZipCheckup}},
  title  = {{Ontario, OR: 14 Violations - Home Safety Score unavailable}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/or/ontario/}
}

Page version: August 2026.

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