PlainWater
Counties → Maryland

Calvert County, Maryland

Water Systems
226
Population Served
83,754
Total Violations
3,228
1,436 health-based
PFAS Detected
1
of 4 tested

Violation Analysis

82.7%
Systems with Violations
14.3
Avg Violations per System
44.5%
Health-Based Violations

Water Source Types

GW
50 systems (22%)

PFAS Contamination

4
Systems Tested
1
PFAS Detected
25.0%
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

Calvert Maryland water systems by violation status, EPA SDWIS records.

No violations on record (13) One or more violations (37)

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
Chesapeake Ranch Estates 9,500 11 Clean
Town of Chesapeake Beach 5,000 7 Clean
Prince Frederick 4,371 15 Clean
Solomons 3,811 12 Clean
Town of North Beach 3,000 32 -
Shoppes at Apple Greene 2,818 12 -
Northern Middle & High Schools 2,470 24 -
Chesapeake Church 2,050 12 -
Beaches Water Co-Operative 2,000 35 -
Huntingtown High School 1,540 0 -
Wawa #573 1,516 0 -
7 - Eleven - Prince Frederick 1,500 0 -
Scientists Cliffs 1,425 15 -
Solomons Recreation Center (Navfac-Wash) 1,200 22 -
Chesapeake Heights (Bayside Forest) 1,190 14 -
Summit/Highlands 1,108 4 -
Fastop #54 1,010 22 -
Calvert Country & Calvert Elementary 900 25 -
Mutual Elementary School 894 8 -
Plum Point Middle School 881 29 -
Calvert County Fairground 807 16 -
Southern Middle School 745 22 -
Mt. Harmony Elementary School 706 19 -
Harriet Elizabeth Brown Community Center 700 0 -
Calvert Middle School 675 13 -
Patuxent Elementary School 637 13 -
Plum Point Elementary School 615 9 -
Town Center Amoco 615 17 -
Huntingtown Elementary School 609 18 -
Dash in Owings 606 16 -
Appeal Elementary School 569 9 -
New Life Church 525 3 -
Bowens Grocery 509 0 -
Dollar General Store 509 0 -
Burger King Dunkirk 506 0 -
Emmanuel Baptist Church 504 11 -
7-11 Sunderland 504 0 -
Sunderland Village Center 500 0 -
The Sickle Farm 494 0 -
Calvert Cliffs Nuclear - Protected Area 482 74 -
Sunderland Elementary School 481 24 -
Southern Calvert Baptist Church 480 0 -
Huntingtown Professional Center, LLC 470 36 -
The Calverton School 461 50 -
Cross Point Subdivision 434 3 -
Results Fitness- Owings 408 3 -
Kings Landing Pool 408 0 -
Bethel Way of the Cross - (Newer Bldg) 406 0 -
Cavalier Country 381 3 -
Cardinal Hickey Academy 380 12 -

Other Counties in Maryland

Montgomery County
56 systems · 1,971,831 served · 1,796 violations
Baltimore city County
13 systems · 1,608,056 served · 122 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

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Calvert County? ▼
Calvert County has 3,228 total drinking water violations across 226 water systems, of which 1,436 are health-based violations. 82.7% of systems have at least one violation.
How many people get water from Calvert County systems? ▼
Water systems in Calvert County serve approximately 83,754 people through 226 public water systems.
Has PFAS been detected in Calvert County water? ▼
Of 4 water systems tested for PFAS in Calvert County, 1 had PFAS detected (25.0% detection rate).
What types of water sources supply Calvert County? ▼
Water systems in Calvert County use GW (50 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. 44.5% of Calvert 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.