PlainWater
Counties → Maryland

Baltimore city County, Maryland

Water Systems
13
Population Served
1,608,056
Total Violations
122
22 health-based
PFAS Detected
1
of 1 tested

Violation Analysis

38.5%
Systems with Violations
9.4
Avg Violations per System
18.0%
Health-Based Violations

Water Source Types

SW
13 systems (100%)

PFAS Contamination

1
Systems Tested
1
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Baltimore city Maryland water systems by violation status, EPA SDWIS records.

No violations on record (8) One or more violations (5)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
City of Baltimore 1,600,000 73 Detected
Johns Hopkins Hospital 2,000 6 -
Johns Hopkins Bayview Medical Center 950 0 -
Mount Washington Pediatric Hospital 870 0 -
Umd Rehabilitation and Orthopedic Inst. 860 0 -
University of Maryland Medical Center 854 0 -
Keswick Multi-Care Center 575 14 -
Ummc - Midtown Campus Armory Building 500 0 -
Metropolitan of Baltimore 414 2 -
Loch Raven VA Medical Center 330 0 -
Grace Medical Center 325 0 -
Manor Care Health Services Roland Park 216 0 -
The Neighborhoods at St. Elizabeth 162 27 -

Other Counties in Maryland

Montgomery County
56 systems · 1,971,831 served · 1,796 violations
Anne Arundel County
425 systems · 567,204 served · 5,956 violations
Howard County
88 systems · 309,588 served · 985 violations
Harford County
238 systems · 217,578 served · 3,670 violations
Frederick County
220 systems · 215,362 served · 3,555 violations
Charles County
171 systems · 143,656 served · 3,860 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Baltimore city County? ▼
Baltimore city County has 122 total drinking water violations across 13 water systems, of which 22 are health-based violations. 38.5% of systems have at least one violation.
How many people get water from Baltimore city County systems? ▼
Water systems in Baltimore city County serve approximately 1,608,056 people through 13 public water systems.
Has PFAS been detected in Baltimore city County water? ▼
Of 1 water systems tested for PFAS in Baltimore city County, 1 had PFAS detected (100.0% detection rate).
What types of water sources supply Baltimore city County? ▼
Water systems in Baltimore city County use SW (13 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 18.0% of Baltimore city County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.