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Tap water quality report

Mountain Lakes Water Dep

EPA monitoring tested this supplier for 82 contaminants and detected 22. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

82
contaminants tested
22
detected
4,012
people served
0
health-based violations
New Jersey rankingsLead in New JerseyPFAS in New Jersey
Water source
Ground water
Ownership
Local government
Counties served
Morris

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
345
violations on file
1
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2025-12-30
MR Monitoring Resolved 2025-12-30
MR Monitoring Resolved 2025-08-01 → 2025-08-31
MR Monitoring Resolved 2025-08-01 → 2025-08-31
MR Monitoring Archived 2025-07-01 → 2025-07-31
MR Monitoring Archived 2025-07-01 → 2025-07-31
MR Monitoring Archived 2025-01-01 → 2025-12-31
MR Monitoring Archived 2025-01-01 → 2025-12-31
MR Monitoring Archived 2025-01-01 → 2025-12-31
MR Monitoring Archived 2025-01-01 → 2025-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOA 0.0133 µg/L 7/7 2025
Pfpea 0.0030 µg/L 1/7 2025

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate-Nitrite
2909.5 µg/L 29%
of the EPA limit 10000 µg/L
worst single sample: 3040 µg/L
64/64 SYR4 2012–2019
Copper
700.25 µg/L 54%
of the EPA limit 1300 µg/L
worst single sample: 1240 µg/L
58/68 SYR4 2013–2019
Chloroform
2.28 µg/L
No EPA limit set
worst single sample: 3.7 µg/L
39/150 SYR4 2012–2019
Lead
9.5 µg/L 63%
of the EPA limit 15 µg/L
worst single sample: 11 µg/L
31/60 SYR4 2013–2019
Dibromochloromethane
5.665 µg/L
No EPA limit set
worst single sample: 5.8 µg/L
28/150 SYR4 2012–2019
Bromoform
3.325 µg/L
No EPA limit set
worst single sample: 3.7 µg/L
26/150 SYR4 2012–2019
TTHM
14.78 µg/L 18%
of the EPA limit 80 µg/L
worst single sample: 16.3 µg/L
20/22 SYR4 2012–2019
Bromodichloromethane
4.78 µg/L
No EPA limit set
worst single sample: 5.9 µg/L
17/150 SYR4 2012–2019
Fluoride
177.5 µg/L 4.4%
of the EPA limit 4000 µg/L
worst single sample: 210 µg/L
14/16 SYR4 2014–2017
Lead
0.0025 mg/L 17%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Total Haloacetic Acids (HAA5)
5.0855 µg/L 8.5%
of the EPA limit 60 µg/L
worst single sample: 5.19 µg/L
12/22 SYR4 2012–2019
Dibromoacetic Acid
3.695 µg/L
No EPA limit set
worst single sample: 5.19 µg/L
11/22 SYR4 2012–2019
Barium
20 µg/L 1%
of the EPA limit 2000 µg/L
 8/8 SYR4 2014–2017
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
 6/8 SYR4 2014–2017
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 3/40 SYR4 2012–2019
Combined Uranium
1.242 µg/L 4.1%
of the EPA limit 30 µg/L
worst single sample: 1.26 µg/L
3/4 SYR4 2015
Gross Alpha, Excl. Radon And U
0.8321 pCi/L 5.5%
of the EPA limit 15 pCi/L
worst single sample: 0.8442 pCi/L
3/4 SYR4 2015
Combined Radium (-226 And -228)
1.576 pCi/L 32%
of the EPA limit 5 pCi/L
worst single sample: 1.58 pCi/L
2/4 SYR4 2015
Dichloroacetic Acid
1.485 µg/L
No EPA limit set
worst single sample: 1.5 µg/L
2/22 SYR4 2012–2019
Trichloroacetic Acid
1.5135 µg/L
No EPA limit set
worst single sample: 1.53 µg/L
2/22 SYR4 2012–2019
60 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideDichloromethaneEthylene DibromideEthylbenzeneHfpo-DaMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
RYDEN, WILLIAM
Phone
973-334-1577

Frequently asked questions about Mountain Lakes Water Dep

Is Mountain Lakes Water Dep tap water safe to drink?

EPA monitoring detected 22 contaminants in Mountain Lakes Water Dep's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Mountain Lakes Water Dep's water?

EPA monitoring detected Nitrate-Nitrite, Copper, Chloroform, Lead, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Mountain Lakes Water Dep serve?

Mountain Lakes Water Dep reports serving 4,012 people in New Jersey, per its EPA record.

Has Mountain Lakes Water Dep had any water quality violations?

The EPA has 345 violations on file for Mountain Lakes Water Dep, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.