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Updated 2026-10-15
County water report

Morris County Water Quality: 11 Cities Ranked by the Records

Morris County, New Jersey: 11 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in Morris County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

Perfluorooctanoic acid (PFOA)Detected in 8 systems of 11 tested4.0 ng/L federal MCL (2024) · US EPAHighest12.5 ng/L
Perfluorooctanesulfonic acid (PFOS)Detected in 6 systems of 11 tested4.0 ng/L federal MCL (2024) · US EPAHighest9.8 ng/L
LithiumDetected in 1 system of 11 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest17.1 µg/L
Perfluorohexanesulfonic acid (PFHxS)Detected in 3 systems of 11 tested10 ng/L federal MCL (2024) · US EPAHighest8 ng/L
Lead (90th percentile)Detected in 10 systems of 11 tested15 µg/L federal action level · US EPAHighest4.92 µg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 6 systems of 11 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest7 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 6 systems of 11 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest10 ng/L
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)Detected in 1 system of 11 testedNo federal or state limit; shown for transparencyHighest7.3 ng/L
3 more contaminants detectedShow
Perfluorobutanoic acid (PFBA)Detected in 5 systems of 11 testedNo federal or state limit; shown for transparencyHighest15.7 ng/L
Perfluoroheptanoic acid (PFHpA)Detected in 4 systems of 11 testedNo federal or state limit; shown for transparencyHighest3.6 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 6 systems of 11 testedNo federal or state limit; shown for transparencyHighest16.7 ng/L
20 PFAS tested, none detected in any systemShow

Tested in these 11 systems: CHATHAM WATER DEPT, DOVER WATER COMMISSION, FLORHAM PARK WATER DEPT, JEFFERSON TWP W U LK HOP, JEFFERSON TWP W U MILTON SYS, LINCOLN PARK WATER DEPT, MADISON WATER DEPT, NJ AMERICAN WATER - ROXBURY, PARSIPPANY-TROY HILLS WATER DEPARTMENT, PEQUANNOCK TWP WATER DEPARTMENT, SOUTHEAST MORRIS COUNTY MUA

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluorononanoic acid (PFNA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
11 cities

Cities ranked by the records

Showing 6 of 11 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Morris County8 of 11 city reports had a PFAS sample above a 2024 EPA limit
  1. Lake Hopatcong9.8 ng/L
  2. Parsippany9.3 ng/L
  3. Dover8.1 ng/L
  4. Morristown6.8 ng/L
  5. Oak Ridge6.8 ng/L
  6. Lincoln Park4 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in New Jersey
Lead

0of 11 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in New Jersey
Who supplies the county

Largest water systems

  1. MorristownSOUTHEAST MORRIS COUNTY MUA · NJ1424001
    62,349 served
  2. ParsippanyPARSIPPANY-TROY HILLS WATER DEPARTMENT · NJ1429001
    50,400 served
  3. DoverDOVER WATER COMMISSION · NJ1409001
    27,806 served
  4. MadisonMADISON WATER DEPT · NJ1417001
    15,820 served
  5. Pompton PlainsPEQUANNOCK TWP WATER DEPARTMENT · NJ1431001
    14,010 served
  6. SuccasunnaNJ AMERICAN WATER - ROXBURY · NJ1436002
    11,793 served
  7. Lincoln ParkLINCOLN PARK WATER DEPT · NJ1416001
    11,000 served
  8. ChathamCHATHAM WATER DEPT · NJ1404001
    8,962 served
  9. Florham ParkFLORHAM PARK WATER DEPT · NJ1411001
    8,846 served
  10. Lake HopatcongJEFFERSON TWP W U LK HOP · NJ1414011
    8,500 served
Questions

Frequently asked

How does Morris County tap water compare across cities?

PurityMap ranks 11 cities in Morris County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Chatham's main water system: CHATHAM WATER DEPT · PWSID NJ1404001 · Purity Score 98 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Morris County cities had a PFAS sample above a 2024 EPA limit?

8 of 11 Morris County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Florham Park (PFOA 12.5 ng/L), Morristown (PFOA 12.1 ng/L), Dover (PFOA 12 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 8.

Is there lead in Morris County tap water?

Utilities report lead as a 90th-percentile result from home taps. 10 of 11 Morris County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

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