States › Maryland › Harford County

Harford County, MD Water Quality

Water quality data for 6 public water systems serving Harford County, Maryland — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 6 water systems · 13 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Harford County Earns a A

Harford County: 13 communities across 6 water systems. 100.0% have no open violations.

  • Median lead where detected: 2.00 ppb
  • 3 communities with a lead detection, 10 reporting none detected
  • 2 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
2 ppb
Median Lead Level
County-wide, 90th percentile
6
Water Systems
Active CWS & NTNCWS
100%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Bel Air South
    Not detected
    No federal limits exceeded on record
    A
  • Bel Air North
    Not detected
    No federal limits exceeded on record
    A
  • Edgewood
    Not detected
    No federal limits exceeded on record
    A
  • Joppatowne
    Not detected
    No federal limits exceeded on record
    A
  • Riverside
    Not detected
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Aberdeen
    Not detected
    PFAS above the limit at 1 of 2 sampling points
    C
  • Bel Air
    2.00 ppb
    PFAS above the limit at 1 of 2 sampling points
    B
  • Havre de Grace
    2.00 ppb
    7 health-based violations since 2015
    B
  • Bel Air South
    Not detected
    No federal limits exceeded on record
    A
  • Bel Air North
    Not detected
    No federal limits exceeded on record
    A
County Lead Level — Median 2 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2 ppb — 13.3% of the federal action level
Systems by Lead Level
Under 5 ppb
3
No Data
10

All Cities in Harford County

Bel Air South Not detected A
Bel Air North Not detected A
Edgewood Not detected A
Aberdeen Not detected C
Havre de Grace 2.00 ppb B
Joppatowne Not detected A
Bel Air 2.00 ppb B
Riverside Not detected A
Abingdon Not detected A
Perryman Not detected A
Pleasant Hills Not detected A
Aberdeen Proving Ground Not detected A
Darlington 1.40 ppb B
Showing 13 cities
No active violations Active violations

About Harford County Drinking Water

Harford County is served by 6 water systems covering 13 communities. No community here has an open violation on record.

Of the communities reporting lead results, 3 recorded a detection, with a median of 2.00 ppb — 13% of the federal action level. 10 reported none detected, which means below the laboratory limit rather than an absence of lead.

2 of 13 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Harford County tap water safe to drink?▼
No community in Harford County has an open violation on record. 2 of 13 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Harford County?▼
Among communities with a detection the median is 2.00 ppb, 13% of the 15 ppb action level. 10 reported none detected and 0 reported no result.
How many water systems serve Harford County?▼
6 community water systems serve 13 communities here.
← Back to Maryland water quality overview