Morris County, New Jersey
58 ZIP codes · Avg score 48/100 · Grade D · Updated 2026-06-03
In recent EPA cycles, Morris County's 58 ZIP codes show a persistent below-average water quality pattern — documented violations span multiple areas, have appeared consistently across recent reporting periods, and the compliance shortfalls are spread across the county rather than isolated to a single geographic pocket or utility district, suggesting a broader structural issue rather than a localized anomaly.
How Morris County Compares
How Morris County Compares
Morris County scores 10 points below the New Jersey state average (58/100) and 20 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Morris County, New Jersey
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.1 (asthma 8.4%, diabetes 9.2%)
Estimated additional annual cost per homeowner: $2,525, driven primarily by flood
Infrastructure: 0.453% avg pipe failure probability, 75% of ZIPs at high risk
72.2% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Morris County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 36 violations. Past 5 years: 102 total (102 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,525
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
186,742 housing units in Morris County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Morris County
Remediation costs are relatively manageable for most homeowners in Morris County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Morris County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Morris County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Jefferson Twp W U Milton Sys | 4,500 | 89 |
| 2 | Mount Olive Twp W D Main | 7,887 | 82 |
| 3 | Mt Olive Villages Water | 5,000 | 82 |
| 4 | Hackettstown Mua | 22,000 | 82 |
| 5 | Mt Olive Village Green Water System | 3,600 | 75 |
54 total water systems serve Morris County.
All ZIP Codes in Morris County
58 ZIP codes tracked in Morris County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 7932 | Florham Park | 69 | C | 3 | $719K |
| 2 | 7857 | Netcong | 68 | C | 1 | $344K |
| 3 | 7976 | New Vernon | 68 | C | 2 | $1375K |
| 4 | 7930 | Chester | 66 | C | 9 (1 health) | $758K |
| 5 | 7885 | Wharton | 65 | C | 0 | $345K |
| 6 | 7927 | Cedar Knolls | 63 | C | 5 | $610K |
| 7 | 7961 | Convent Station | 63 | C | 3 | — |
| 8 | 7802 | Dover | 62 | C | 5 | — |
| 9 | 7005 | Boonton | 59 | C | 15 (1 health) | $566K |
| 10 | 7803 | Mine Hill | 57 | C | 8 | $378K |
| 11 | 7940 | Madison | 57 | C | 5 | $883K |
| 12 | 7045 | Montville | 56 | C | 17 (3 health) | $647K |
| 13 | 7054 | Parsippany | 56 | C | 6 | $569K |
| 14 | 7046 | Mountain Lakes | 53 | D | 0 | $915K |
| 15 | 7082 | Towaco | 53 | D | 0 | $687K |
| 16 | 7845 | Ironia | 53 | D | 0 | — |
| 17 | 7852 | Ledgewood | 53 | D | 0 | $425K |
| 18 | 7876 | Succasunna | 53 | D | 0 | $481K |
| 19 | 7926 | Brookside | 53 | D | 0 | — |
| 20 | 7934 | Gladstone | 53 | D | 0 | $816K |
| 21 | 7970 | Mount Freedom | 53 | D | 0 | — |
| 22 | 7977 | Peapack | 53 | D | 0 | $799K |
| 23 | 7828 | Budd Lake | 50 | D | 75 (8 health) | $433K |
| 24 | 7435 | Newfoundland | 49 | D | 20 (6 health) | $465K |
| 25 | 7457 | Riverdale | 49 | D | 10 | $385K |
| 26 | 7853 | Long Valley | 48 | D | 7 | $601K |
| 27 | 7801 | Dover | 47 | D | 5 | $369K |
| 28 | 7856 | Mount Arlington | 47 | D | 16 | $390K |
| 29 | 7405 | Butler | 46 | D | 23 (7 health) | $553K |
| 30 | 7866 | Rockaway | 46 | D | 11 | $434K |
| 31 | 7865 | Port Murray | 45 | D | 0 | $374K |
| 32 | 7869 | Randolph | 45 | D | 0 | $636K |
| 33 | 7931 | Far Hills | 45 | D | 0 | $1084K |
| 34 | 7945 | Mendham | 45 | D | 0 | $894K |
| 35 | 7950 | Morris Plains | 45 | D | 0 | $571K |
| 36 | 8802 | Asbury | 45 | D | 0 | $459K |
| 37 | 8808 | Broadway | 45 | D | 0 | — |
| 38 | 7850 | Landing | 43 | D | 10 (2 health) | $387K |
| 39 | 7444 | Pompton Plains | 42 | D | 14 | $488K |
| 40 | 7058 | Pine Brook | 40 | D | 0 | $686K |
| 41 | 7403 | Bloomingdale | 40 | D | 0 | $397K |
| 42 | 7806 | Picatinny Arsenal | 40 | D | 0 | — |
| 43 | 7836 | Flanders | 40 | D | 0 | $518K |
| 44 | 7842 | Hibernia | 40 | D | 0 | — |
| 45 | 7847 | Kenvil | 40 | D | 0 | $338K |
| 46 | 7878 | Mount Tabor | 40 | D | 0 | $436K |
| 47 | 7880 | Vienna | 40 | D | 0 | $406K |
| 48 | 7981 | Whippany | 40 | D | 0 | $611K |
| 49 | 7999 | Whippany | 40 | D | 0 | — |
| 50 | 8848 | Milford | 40 | D | 0 | $394K |
| 51 | 7035 | Lincoln Park | 36 | F | 12 (5 health) | $423K |
| 52 | 7834 | Denville | 36 | F | 1 | $552K |
| 53 | 7034 | Lake Hiawatha | 35 | F | 0 | $403K |
| 54 | 7849 | Lake Hopatcong | 35 | F | 69 (10 health) | $413K |
| 55 | 7440 | Pequannock | 30 | F | 0 | $515K |
| 56 | 7960 | Morristown | 27 | F | 5 | $701K |
| 57 | 7962 | Morristown | 25 | F | 5 | — |
| 58 | 7963 | Morristown | 25 | F | 5 | — |
Recommended Buyer Guides for Morris County
Editorial-only picks, screened against the EPA detections on file.
- Best Water Filters for Lead — Lead above EPA action level in 3 ZIP codes
- Best Lead Paint Test Kits — 72.2% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
Deep Dive Reports
Detailed analysis for Morris County, New Jersey
Overview
Morris County in New Jersey covers 58 ZIP codes with an average Home Safety Score of D (48/100).
28 of 58 ZIP codes have recorded EPA violations. 43 health-based violations have been documented.
← Back to New Jersey water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.
What You Can Do
Morris County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
72.2% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.