Mattawa, WA: 1 Health Violation - Home Safety 82/100
1 ZIP code · 1 water system · Updated
ZipCheckup grade for Mattawa: B.
This ZIP has a few items worth a quick check.
Tap water system records for Mattawa, WA support a high grade on this site; review your own system's entries for specifics.
How Mattawa Compares
Data: EPA SDWIS
Key Facts for Mattawa Residents
- Your city's water systems recorded 2 violations since 2021.
- Homes built before 1986: 26% - older plumbing may contain lead solder.
- Estimated remediation: $300 per household.
- Health risk index (ZipCheckup composite of CDC data): 12.63.
Mattawa's Water Providers
Just one provider appears in the list below for Mattawa, WA, among 1 on the federal list. A listing shows which system is tied to the area, not which one serves a particular street; the water bill or the utility itself confirms that for a given address.
- B
Overview
We track home safety data for 1 ZIP code in Mattawa, Washington, covering 1 community water system serving approximately 8,098 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. 1 health-based violation appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for Mattawa: B (82/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Mattawa water systems draw from: Groundwater.
Lead & Copper
- Average of reported 90th-percentile lead results: reported as 0 mg/L (a reported 0 is not proof of no lead; check the source record for its reporting limit) (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
1 of 1 ZIP records with known zones is in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Consumer Confidence Rule | Reporting | 2 | 1 |
| Revised Total Coliform Rule | Microbiological | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 99349 | B | 2 | 1 | City of Mattawa |
All ZIP Codes in Mattawa
- 99349 [B] - 2 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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
Mattawa Community Health Snapshot
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in Mattawa's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Mattawa Infrastructure Age
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Housing age is a rough starting point, not an answer. Mattawa has a median build year of 1992, but any single home may be older or newer than that figure, may have had plumbing replaced, or may still have original fixtures. Lead can also come from a service line or older brass fittings, so a water test or a check of the utility's service line inventory says more about one address than the citywide build year does.
Most homes in Mattawa were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Mattawa
Estimated remediation for Mattawa is a small fraction of median property value - one percent or less - though the ratio does not describe any single household.
Estimated remediation costs in Mattawa can be compared with local home values. The $150–$600 estimated range can be set against the median property value; actual costs vary by home. Home values are 12% below the Washington average.
Mattawa: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
A tap test is the direct way to learn the lead level in a given Mattawa home; 26% of local housing predates 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Mattawa, WA