Millersville, MD 21108

15 water systems • 390,647 residents

Excellent water quality with minimal contaminants

A

Score: 84/100

Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.

Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts

19

Contaminants Detected

232

Violations on Record

31

Health-Based Violations

0

Recent Violations

Grade Breakdown

Contaminant Count6 / 25
Violation History23 / 25
Contaminant Severity22 / 25
System Compliance0 / 15
Enforcement History0 / 10
Total Score84%

84 / 100 points

Recommended Water Filters

  • ✓Point-of-Use Carbon Filter (NSF-certified for lead)
  • ✓Reverse Osmosis or Ion Exchange Filter
  • ✓Ultraviolet (UV) Purification
  • ✓Activated Carbon Filter (disinfection byproducts)
Compare filter types in our Filter Guide →

Consult a water quality specialist for personalized recommendations.

Millersville vs MD & National Average

Detected Contaminants

19 contaminants detected across water systems serving this ZIP code

ContaminantCategory
NitrateAgricultural
Total Haloacetic Acids (HAA5)Disinfection Byproduct
TTHMDisinfection Byproduct
Antimony, TotalHeavy Metal
BariumHeavy Metal
Beryllium, TotalHeavy Metal
CadmiumHeavy Metal
ChromiumHeavy Metal
Lead and Copper RuleHeavy Metal
LEAD AND COPPER RULE REVISIONSHeavy Metal
MercuryHeavy Metal
NickelHeavy Metal
SeleniumHeavy Metal
Thallium, TotalHeavy Metal
FluorideInorganic
Coliform (TCR)Microorganism
Consumer Confidence RuleOther
Stage 2 Disinfectants and Disinfection Byproducts RuleOther
Combined Radium (-226 and -228)Radiological

Water System Information

Systems Serving This ZIP:
EASTERN CORRECTIONAL INSTITUTE, CROWNSVILLE HOSPITAL CENTER, CHELTENHAM BOYS VILLAGE, SAINT MARYS COLLEGE, BROAD CREEK +5 more
Population Served:
390,647
Systems With Violations:
15 of 15
Major Violations:
93
Enforcement Actions:
231

Nearby Areas

21401

Annapolis • 2 mi away

A

21144

Severn • 2.2 mi away

A

21146

Severna Park • 2.7 mi away

A

21405

Annapolis • 4.1 mi away

A

21054

Gambrills • 5 mi away

B

21114

Crofton • 5.8 mi away

B

Frequently Asked Questions

What does the grade mean?

Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.

Is my tap water safe to drink?

Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.

How often is the data updated?

We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.

What filters do you recommend?

Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.