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Morris County, NJ Water Quality

Water quality data for 31 public water systems serving Morris County, New Jersey — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 31 water systems · 43 cities
⚠️
Caution Advised — Some Systems Need Attention

Some systems have elevated lead levels or active violations. Check your specific city below.

C

Morris County Earns a C

Morris County: 43 communities across 31 water systems. 100.0% have no open violations.

  • Median lead where detected: 3.00 ppb
  • 38 communities with a lead detection, 5 reporting none detected
  • 31 communities with PFAS above the federal limit
  • 1 with significant inspection deficiencies
  • 100.0% of communities have no open violations
3 ppb
Median Lead Level
County-wide, 90th percentile
31
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
  • Randolph
    3.35 ppb
    No federal limits exceeded on record
    A
  • Chatham
    1.40 ppb
    No federal limits exceeded on record
    A
  • Mount Arlington
    3.47 ppb
    No federal limits exceeded on record
    A
  • Riverdale
    Not detected
    No federal limits exceeded on record
    B
  • Mine Hill
    4.84 ppb
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Jefferson
    Not detected
    PFAS above the limit at 2 of 2 sampling points
    D
  • Boonton
    1.13 ppb
    PFAS above the limit at 2 of 2 sampling points
    D
  • Oak Ridge
    4.92 ppb
    PFAS above the limit at 3 of 3 sampling points
    D
  • Boonton
    1.13 ppb
    PFAS above the limit at 2 of 2 sampling points
    D
  • Mountain Lakes
    2.53 ppb
    PFAS above the limit at 3 of 3 sampling points
    D
County Lead Level — Median 3 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 3 ppb — 20% of the federal action level
Systems by Lead Level
Under 5 ppb
35
5 – 10 ppb
2
10 – 15 ppb
1
No Data
5

All Cities in Morris County

Parsippany-Troy Hills 3.33 ppb C
Morris 1.50 ppb C
Randolph 3.35 ppb A
Morristown 1.50 ppb C
Montville 4.69 ppb C
Dover 2.78 ppb C
Denville 12.70 ppb C
Madison 2.55 ppb C
Rockaway 2.81 ppb C
Hanover 1.50 ppb C
Pequannock 5.09 ppb B
Roxbury 4.00 ppb A
East Hanover 1.31 ppb C
Chatham 3.00 ppb B
Lincoln Park 4.10 ppb C
Chatham 1.40 ppb A
Florham Park 2.53 ppb C
Boonton 1.13 ppb D
Long Hill 3.00 ppb B
Jefferson Not detected D
Mount Olive Not detected C
Wharton 8.57 ppb A
Butler Not detected C
Rockaway 4.07 ppb C
Morris Plains 1.50 ppb C
Oak Ridge 4.92 ppb D
Washington Not detected C
Mendham 3.00 ppb B
Mount Arlington 3.47 ppb A
Mountain Lakes 2.53 ppb D
Mendham 3.00 ppb B
Riverdale Not detected B
Netcong 2.71 ppb B
Mine Hill 4.84 ppb A
Kinnelon 4.50 ppb B
Harding 1.50 ppb C
Victory Gardens 2.78 ppb C
Mount Tabor 3.33 ppb C
Green Village 3.00 ppb B
Boonton 1.13 ppb D
Lower Berkshire Valley 4.00 ppb A
Chester 1.00 ppb B
Chester 2.57 ppb C
Showing 43 cities
No active violations Active violations

About Morris County Drinking Water

Morris County is served by 31 water systems covering 43 communities. No community here has an open violation on record.

Of the communities reporting lead results, 38 recorded a detection, with a median of 3.00 ppb — 20% of the federal action level. 5 reported none detected, which means below the laboratory limit rather than an absence of lead.

31 of 43 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded significant deficiencies at 1 of them.

Frequently Asked Questions

Is Morris County tap water safe to drink?▼
No community in Morris County has an open violation on record. 31 of 43 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Morris County?▼
Among communities with a detection the median is 3.00 ppb, 20% of the 15 ppb action level. 5 reported none detected and 0 reported no result.
How many water systems serve Morris County?▼
31 community water systems serve 43 communities here.
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