CITY REPORT SC

Seneca, SC: 10 Violations - Home Safety Score unavailable

3 ZIP codes · 7 water systems · Updated

Data: EPA SDWIS

3
ZIP Codes
7
Water Systems
2
ZIPs Linked to Systems with Violations
Zone 2
County Radon Potential (Moderate)
$394K
Median Home Value

Seneca Water: The Quick Version

  • Your city's water systems recorded 10 violations since 2021.
  • Average of reported 90th-percentile lead results: 0.0045 mg/L.
  • Homes built before 1986: 45% - older plumbing may contain lead solder.
  • Health risk index (ZipCheckup composite of CDC data): 14.98.

Water Systems Serving Seneca

3 systems shown for Seneca, SC, from 7 on the federal list.

Overview

We track home safety data for 3 ZIP codes in Seneca, South Carolina (population ~35,871), covering 7 community water systems serving approximately 92,043 people region-wide. The EPA snapshots used for this build directly map water systems to 2 of 3 ZIP codes.

2 of 2 ZIP codes 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

Seneca water systems draw from: Groundwater, Surface water.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0045 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 2 ZIP codes with known status exceed the EPA lead action level

Radon Risk

3 of 3 ZIP records with known zones are 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
Lead and Copper Rule Treatment Technique 8 2
Total Trihalomethanes (TTHM) Disinfection Byproducts 4 1
Lead and Copper Rule Revisions Treatment Technique 4 2
Consumer Confidence Rule Reporting 3 2
Haloacetic Acids (HAA5) Disinfection Byproducts 2 1

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
29678 — 10 0 Seneca City of (sc3710002)
29672 — 4 0 Seneca City of (sc3710002)

All ZIP Codes in Seneca

  • 29672 - 4 violations recorded for mapped water systems
  • 29678 - 10 violations recorded for mapped water systems
  • 29679

Data Sources

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

CDC Health Data for Seneca

9.8%
Asthma (US: 9.8%)
15.3%
Diabetes (US: 10.4%)
15.8%
Poor Mental Health (US: 14.8%)

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

Asthma 9.8% ↓
Diabetes 15.3% ↑
Mental Health 15.8% ↑

Vertical line = national average. ■ Above national · ■ Below national

Key Contaminants Detected in Seneca

Lead and Copper Rule 8 violations
Treatment Technique
Developmental delays in children, kidney damage
Total Trihalomethanes (TTHM) 4 violations
Disinfection Byproducts · EPA regulatory level for the contaminant named above: 0.08 mg/L
Increased cancer risk with long-term exposure above the MCL
Lead and Copper Rule Revisions 4 violations
Treatment Technique

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

How Old Is Seneca's Housing Stock?

1991
Median Build Year
45%
Built Before 1986
21%
Built Before 1970
Copper
Likely Pipe Material

With 45% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.

Source: U.S. Census Bureau American Community Survey (ACS).

Housing Age Profile

Check your utility's service line inventory as well as your home's build year; in Seneca, where the median build year is 1991, both pieces help.

1991
Median Year Built
45%
Pre-1986 (lead solder era; lead paint banned 1978)
21%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (21%) 1970–1986 (24%) Post-1986 (55%)

Most homes in Seneca 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.

Protecting Children from Lead in Seneca

45%
Homes Built Before 1986
0.0045
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

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.

If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.

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

Historical Flood-Claim Evidence for Seneca

8
Total FEMA Flood Claims
$7,156
Avg Reported Sum With Payment Data
50%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Seneca contains 8 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $7,156. Among ZIP codes with claim records, 50% 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.

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 violations are on record for water systems serving Seneca?
EPA records list 10 EPA violations for Seneca water systems. These water-system violations are shown for 3 mapped ZIP codes.
Does Seneca water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Seneca is 0.0045 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How many water systems serve Seneca?
Our records map 7 water systems to 3 ZIP codes in Seneca. The related population figure in our data is approximately 35,871 people; it is not a count of people served citywide.
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How to cite this page

APA ZipCheckup. (2026). Seneca, SC: 10 Violations - Home Safety Score unavailable. https://zipcheckup.com/cities/sc/seneca/
BibTeX
@misc{zipcheckup-cities-sc-seneca,
  author = {{ZipCheckup}},
  title  = {{Seneca, SC: 10 Violations - Home Safety Score unavailable}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/sc/seneca/}
}

Page version: October 2026.

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