Water Quality Report · Updated May 12, 2026
SOUTHEAST MORRIS COUNTY MUA
SOUTHEAST MORRIS COUNTY MUA delivers tap water graded F (53/100) by TapWaterSafety.org. The utility serves approximately 62,349 residents in MENDHAM TWP.-1419, New Jersey using surface water. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Arsenic detected. For questions, the utility can be reached at 973-476-4341.
Is MENDHAM TWP.-1419 tap water safe to drink?
SOUTHEAST MORRIS COUNTY MUA delivers tap water that earns a grade of F (53/100) from TapWaterSafety.org — a poor rating, with significant contamination concerns and/or recent violations.
The utility serves 62,349 residents in MENDHAM TWP.-1419 and 6 other communities, drawing from surface water.
Public testing data identifies 19 contaminants in this water above EWG's health-based guidelines, including: Perfluorooctanoic acid (PFOA), Perfluorohexane sulfonate (PFHXS), Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Trichloroacetic acid, Bromodichloromethane, Dichloroacetic acid, Chloroform, Dibromochloromethane, Dibromoacetic acid, Chromium (hexavalent), Radium, combined (-226 and -228), Arsenic, Nitrate, Nitrate and nitrite, Perfluorooctane sulfonate (PFOS), Uranium, Bromoform. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
Quick actions for MENDHAM TWP.-1419 residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for SOUTHEAST MORRIS COUNTY MUA.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 1.27 ppt, 1272x above the EWG health guideline of 0.001 ppt.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 32.6 ppb, 543x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 50.8 ppb, 339x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.0357 ppb.
Contact SOUTHEAST MORRIS COUNTY MUA
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for MENDHAM TWP.-1419
Filters matched to the specific contaminants in this water supply.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 53/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) PFAS |
5.71 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | EPA violation |
| Perfluorohexane sulfonate (PFHXS) PFAS |
1.27 ppt | 0.001 | 10.0 | — | — | — | — | 1272× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
32.6 ppb | 0.06 | — | — | — | — | — | 543× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
50.8 ppb | 0.15 | 80.0 | 100 | — | — | — | 339× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
33.4 ppb | 0.1 | 60.0 | 60 | — | — | — | 334× over |
| Trichloroacetic acid Disinfection byproduct |
19.6 ppb | 0.1 | — | — | — | — | — | 196× over |
| Bromodichloromethane Disinfection byproduct |
7.74 ppb | 0.06 | — | — | — | — | — | 129× over |
| Dichloroacetic acid Disinfection byproduct |
12.7 ppb | 0.2 | — | — | — | — | — | 64× over |
| Chloroform Disinfection byproduct |
23.3 ppb | 0.4 | — | — | — | — | — | 58× over |
| Dibromochloromethane Disinfection byproduct |
3.25 ppb | 0.1 | — | — | — | — | — | 33× over |
| Dibromoacetic acid Disinfection byproduct |
0.717 ppb | 0.03 | — | — | — | — | — | 24× over |
| Chromium (hexavalent) Heavy metal |
0.283 ppb | 0.02 | — | — | — | — | — | 14× over |
| Radium, combined (-226 and -228) Radiological |
0.46 pCi/L | 0.05 | 5.0 | — | — | — | — | 9.1× over |
| Arsenic Heavy metal |
0.0357 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 8.9× over |
| Nitrate Inorganic |
1.1 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 7.9× over |
| Nitrate and nitrite Inorganic |
1.1 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 7.9× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
1.85 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 6.2× over |
| Uranium Radiological |
0.75 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 1.7× over |
| Bromoform Disinfection byproduct |
0.517 ppb | 0.5 | — | — | — | — | — | 1.0× over |
| 1,4-Dioxane Semi-volatile organic compound |
0.302 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Chlorate Disinfection byproduct |
90.2 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.0118 ppb | 0.06 | 5.0 | — | — | — | — | Below guideline |
| Barium Heavy metal |
49.1 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Manganese Heavy metal |
4.37 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| MTBE Volatile organic compound |
0.521 ppb | 13.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.788 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
3.63 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.32 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
0.127 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
2.46 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
2.3 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
2.12 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.955 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.835 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.00102 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.218 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.445 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.76 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.0325 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
SOUTHEAST MORRIS COUNTY MUA service area
This water system serves 7 communities in Morris County, New Jersey. Click any city for its dedicated tap water quality page.
Find the right filter for MENDHAM TWP.-1419 water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.