STATE REPORT DC HEALTH VIOLATIONS: 3

District of Columbia Home Safety Profiles by ZIP

286 ZIP codes · 2 water systems · IPC plumbing code

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData, NWS, State plumbing boards, Rewiring America

ZipCheckup tracks drinking-water and home-safety data for 286 ZIP codes across District of Columbia, covering 2 public water systems that serve about 632,323 people. 36 ZIP codes are mapped to at least one water system with an EPA violation on record.

286
ZIP Codes
2
Water Systems
36
ZIPs with Violations
IPC
Plumbing Code
2
Avg Rebate Programs

Overview

We track multi-source home safety signals for 286 ZIP records across District of Columbia. Home Safety Score model 4.0.0 is published for 0 scored records; missing required evidence suppresses the score.

The EPA snapshots used for this build directly map water systems to 36 ZIP records, covering 2 community water systems that serve approximately 632,323 people.

36 of 36 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 3 health-based violations appear in the available health breakdown.

Plumbing Regulations

District of Columbia follows the International Plumbing Code (2021 edition).

  • Plumbing code: IPC (2021)
  • Homeowner DIY: Licensed plumber required
  • Water heater permit: Required
  • Annual backflow test: Required

Full District of Columbia regulations →

Energy & Water Rebates

Across 232 tracked ZIP codes in District of Columbia, residents have access to an average of 2 water-related rebate programs - including incentives for heat pump water heaters, efficient fixtures, and plumbing upgrades.

Check rebates for your ZIP code →

Areas with Most Violations

ZIP Code City Home Safety Grade Violations Health-Based System
20032 Washington — 33 3 D.c. Water and Sewer Authority
20001 Washington — 4 0 D.c. Water and Sewer Authority
20002 Washington — 4 0 D.c. Water and Sewer Authority
20003 Washington — 4 0 D.c. Water and Sewer Authority
20004 Washington — 4 0 D.c. Water and Sewer Authority
20005 Washington — 4 0 D.c. Water and Sewer Authority
20006 Washington — 4 0 D.c. Water and Sewer Authority
20007 Washington — 4 0 D.c. Water and Sewer Authority
20008 Washington — 4 0 D.c. Water and Sewer Authority
20009 Washington — 4 0 D.c. Water and Sewer Authority

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0020 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 36 ZIP codes with known status exceed the EPA lead action level

ZIP Code Reports for District of Columbia

Largest Communities

ZIP Code City Population Safety Grade Violations
20032 Washington 651,635 — 33
20001 Washington 632,323 — 4
20002 Washington 632,323 — 4
20003 Washington 632,323 — 4
20004 Washington 632,323 — 4
20005 Washington 632,323 — 4
20006 Washington 632,323 — 4
20007 Washington 632,323 — 4
20008 Washington 632,323 — 4
20009 Washington 632,323 — 4
20010 Washington 632,323 — 4
20011 Washington 632,323 — 4
20012 Washington 632,323 — 4
20015 Washington 632,323 — 4
20016 Washington 632,323 — 4
20017 Washington 632,323 — 4
20018 Washington 632,323 — 4
20019 Washington 632,323 — 4
20020 Washington 632,323 — 4
20024 Washington 632,323 — 4

All 286 ZIP Codes in District of Columbia

Data Sources

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

Largest water systems in District of Columbia

The 2 largest community water systems in District of Columbia, out of 2 in our data.

Systems with the most violations in District of Columbia

2 systems in District of Columbia with the most recorded EPA violations.

Frequently Asked Questions

Is the water safe to drink in District of Columbia?

District of Columbia has 2 community water systems serving 632,323 people across 286 ZIP codes. There are 33 recorded violations among these water systems, including 3 health-based. 36 of 286 ZIP codes are mapped to at least one water system with a recorded violation.

What plumbing code does District of Columbia follow?

District of Columbia's listed plumbing code type is IPC as of our last review; local jurisdictions may adopt or amend codes. Plumbing work may require a licensed plumber; check state exemptions and local requirements.

How to cite this page

APA ZipCheckup. (2026). District of Columbia Home Safety Profiles by ZIP. https://zipcheckup.com/states/district-of-columbia/
BibTeX 
@misc{zipcheckup-states-district-of-columbia,
  author = {{ZipCheckup}},
  title  = {{District of Columbia Home Safety Profiles by ZIP}},
  year   = {2026},
  url    = {https://zipcheckup.com/states/district-of-columbia/}
}

Page version: October 2026.

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