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EPA SDWIS City OverviewWater Testing & Safety Guide

Cedar Knolls, NJ Water Quality Testing & Safety Report

EPA compliance records, water testing guidelines, and hardness metrics for all 1 ZIP code in Cedar Knolls, New Jersey

Sahajul HaqueData aggregated & verified by Sahajul Haque from federal SDWIS & ECHO filings
Quick EPA Verified Summary

Is Tap Water Safe to Drink in Cedar Knolls, NJ?

Tap water in Cedar Knolls, NJ receives an EPA Safety Grade of C (63/100) due to 0 health-based violation(s) and elevated lead risk. While treated by local utilities, residents are advised to test tap water and use an NSF/ANSI 53 certified filter for drinking and cooking.

Average Score

63/100

Health Violations

0

Water Hardness

Moderately Hard

105 mg/L (6.1 GPG)

High Lead Risk

0

of 1 ZIP codes

C

About Tap Water in Cedar Knolls, NJ

Drinking water in Cedar Knolls, NJ receives an average water quality grade of C (score: 63/100) across its 1 ZIP code. Safe Drinking Water Act compliance monitoring is managed by local utilities including Southeast Morris County Mua.

Water Quality Testing in Cedar Knolls, NJ

Tap Water & Well Water Testing Recommendations

Testing your drinking water in Cedar Knolls confirms whether contaminants like lead, nitrates, bacteria, and PFAS are entering your home. While municipal utilities test water before distribution, private plumbing and private well systems require homeowner testing.

Tap Water Testing Checklist

  • 1.Identify your plumbing age: Homes built before 1986 in Cedar Knolls may have lead solder or lead service lines.
  • 2.Request your utility's latest Consumer Confidence Report (CCR) for annual municipal baseline data.
  • 3.Use an EPA-certified laboratory or state-certified test kit for precision lead and PFAS detection (standard DIY strips cannot reliably measure trace heavy metals).
  • 4.Collect a "first draw" sample: Test water that has sat motionless in pipes for at least 6 hours to check for plumbing corrosion.

Private Well Water Testing Checklist

  • •Private wells in NJ are not monitored by the EPA or New Jersey Department of Environmental Protection — testing is 100% the homeowner's responsibility.
  • •Annual Test: Screen for Total Coliform Bacteria, E. coli, Nitrates/Nitrites, and pH every spring.
  • •Comprehensive Test (Every 3-5 Years): Test for heavy metals (Lead, Arsenic, Uranium), Volatile Organic Compounds (VOCs), and Hardness.
  • •Post-Disruption Testing: Immediately test well water following heavy floods, local construction, agricultural runoff, or sudden taste/odor changes.

Critical Water Testing Parameters for Cedar Knolls Residents

ParameterHealth ReasonEPA Limit / Standard
Lead (Pb)Plumbing corrosion; dangerous neurotoxin for children15 ppb (Action Level) / 0 ppb Goal
Total Coliform & E. ColiBacterial contamination from sewage or surface runoff0 mg/L (Zero Tolerance)
Nitrates / NitritesFertilizer and septic tank seepage; causes blue baby syndrome10 mg/L (MCL)
Water Hardness (Ca & Mg)Affects appliance lifespan, scale buildup, and skin hydrationModerate (~100 mg/L)
PFAS ("Forever Chemicals")Industrial non-stick chemicals linked to metabolic and immune issues4.0 ppt (EPA 2024 Rule)
State Regulatory Oversight: Environmental standards and certified water lab registries in NJ are maintained by the New Jersey Department of Environmental Protection.

Water Quality by ZIP Code — Cedar Knolls, NJ

Showing 1 of 1 monitored ZIP code in Cedar Knolls

C
07927

Cedar Knolls, NJ

Score: 63/100✓ Clean Record

All Cedar Knolls, NJ ZIP Code Reports (1 Total)

07927

Nearby Cities Water Quality & Testing in New Jersey

Compare tap water safety, EPA test scores, and water hardness across neighboring cities in New Jersey:

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Frequently Asked Questions — Cedar Knolls Water Quality & Testing

Is tap water safe to drink in Cedar Knolls, NJ?+
Tap water in Cedar Knolls has a grade of C, indicating compliance concerns in recent years. Families with young children or pregnant women should consider using a certified NSF/ANSI 53 water filter for drinking and cooking.
How do I test water quality in Cedar Knolls, NJ?+
To test water quality in Cedar Knolls, you can order an EPA-compliant drinking water test kit or submit samples to a state-certified environmental testing laboratory in NJ. Testing is especially recommended for homes built before 1986 (to check for lead in plumbing) and for properties with private well systems.
Should I test private well water in Cedar Knolls?+
Yes. Unlike municipal tap water, private wells in Cedar Knolls, NJ are not monitored or regulated by the EPA or local utilities. Private well owners are responsible for testing their water annually for coliform bacteria and nitrates, and every 3 to 5 years for heavy metals (lead, arsenic) and volatile organic compounds.
How hard is the tap water in Cedar Knolls?+
Tap water in Cedar Knolls is classified as Moderately Hard with an estimated average hardness of 105 mg/L (6.1 GPG). A water softener is generally optional.
What is the water quality score for Cedar Knolls?+
The average water quality score across 1 ZIP code in Cedar Knolls, NJ is 63/100. Scores are derived from EPA violation history, lead levels, enforcement actions, and infrastructure risk indicators. Individual ZIP codes may vary — search your specific ZIP above for a personalized report.
Does Cedar Knolls have lead in its tap water?+
Lead risk ratings in Cedar Knolls are relatively low based on EPA monitoring data. However, lead in home plumbing is a separate concern — if your home was built before 1986, individual tap testing is recommended.
Where does Cedar Knolls's tap water come from?+
Tap water in Cedar Knolls, NJ primarily comes from surface water. Surface water systems treat water from rivers, lakes, or reservoirs using filtration, sedimentation, and disinfection before it reaches your tap.

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