City of Baltimore
EPA ID: MD0300002 · 1,600,000 people served · 60 ZIP codes
ZipCheckup's reading of EPA records for City of Baltimore (MD0300002): 2 health-based violations recorded since 2021. 9 violations on file at City of Baltimore, none open; 1,600,000 people served.
Data: EPA SDWIS
Service Area Map
Coverage area for City of Baltimore Source: EPA SDWIS service area boundaries.
Service area boundary - average Home Safety grade of mapped ZIPs: C
Demographics of ZIP Codes Served
The ZIP codes associated with City of Baltimore have a median household income of $87,669 and about 1,477,708 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 71% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
City of Baltimore's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 64th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 51 detections recorded.
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
City of Baltimore (EPA ID: MD0300002) is a community water system in Maryland that serves approximately 1,600,000 people from surface water sources.
This system provides water to 60 ZIP codes across 34 communities.
ZIP-Area Home Safety Context: C (64/100)
This is the average Home Safety Score for 48 of 60 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Status breakdown for accepted records with record years 2021-2026: 8 resolved, 1 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| January 1, 2026 | TTHM | Health-based | Archived |
| July 2, 2025 | LEAD AND COPPER RULE REVISIONS | Non-health-based | Resolved |
| April 1, 2023 | Toxaphene | Non-health-based | Resolved |
| April 1, 2023 | Toxaphene | Non-health-based | Resolved |
| April 1, 2023 | Chlordane | Non-health-based | Resolved |
| April 1, 2023 | Chlordane | Non-health-based | Resolved |
| January 1, 2023 | Nitrate | Non-health-based | Resolved |
| September 5, 2022 | Public Notice | Non-health-based | Resolved |
| September 1, 2022 | Revised Total Coliform Rule | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Toxaphene | Other Violation | 2 | No |
| Chlordane | Other Violation | 2 | No |
| Nitrate | Monitoring & Reporting | 1 | No |
| TTHM | MCL Violation | 1 | Yes |
| LEAD AND COPPER RULE REVISIONS | Monitoring & Reporting | 1 | No |
| Public Notice | Other (notice or report rule) | 1 | No |
| Revised Total Coliform Rule | MCL Violation | 1 | Yes |
Health Risk Details
Haloacetic Acids (HAA5) (EPA limit: 0.06 mg/L)
Increased risk of cancer
Treatment options (verify a product is certified to reduce this contaminant): granular activated carbon (GAC), carbon block filter, reverse osmosis. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0027 mg/L | No | 2024-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
59 of 60 ZIP records with known zones are in EPA Radon Zone 1. 1 of 60 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.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by MD or modeled from parcel and building-footprint data.
This system serves 60 ZIP codes:
21030 · 21031 · 21043 · 21052 · 21057 21071 · 21087 · 21093 · 21111 · 21117 21128 · 21131 · 21133 · 21136 · 21152 21153 · 21162 · 21163 · 21201 · 21202 21204 · 21205 · 21206 · 21207 · 21208 21209 · 21210 · 21211 · 21212 · 21213 21214 · 21215 · 21216 · 21217 · 21218 21219 · 21220 · 21221 · 21222 · 21223 21224 · 21225 · 21226 · 21227 · 21228 21229 · 21230 · 21231 · 21233 · 21234 21236 · 21237 · 21239 · 21244 · 21250 21251 · 21252 · 21285 · 21286 · 21287
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for City of Baltimore (MD0300002) on EPA.gov.
Frequently Asked Questions
Is City of Baltimore water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for City of Baltimore; its 9 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does City of Baltimore serve?
City of Baltimore serves approximately 1,600,000 people across 60 ZIP codes in Maryland.
Where does City of Baltimore get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected; the table compares each one with the EPA MCL where one exists (April 2024 rule, compliance required from 2029) and with this state's enforceable standard where one exists.
EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). City of Baltimore (MD): 2 Health Violations. https://zipcheckup.com/water-system/md0300002/
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url = {https://zipcheckup.com/water-system/md0300002/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
City of Baltimore (EPA ID: MD0300002) - request the latest Consumer Confidence Report or ask about specific contaminants.