Where does the water in 07645 come from?

Water for zip code 07645 in Montvale, New Jersey is provided by 16 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 07645

Montvale, New Jersey · Bergen County

82 PPM

4.8 GPG

Slightly Hard

0Soft60120180300+

Verified — Annual Water Quality Report

Dataset updated March 9, 2026Matched to 16 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 16 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis

5 verified treated-water sources

16 matched systems total for this ZIP; treated-water reports are prioritized when available.

Water source profile

Primarily surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.

Data recency

March 9, 2026

Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems Serving 07645

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

16 water systems

PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.

Water System	Source	Hardness	Pop. Served	Data Source
Veolia Water New Jersey Hackensack NJ0238001	surface water	40 PPM Soft USGS estimate: 169 PPM	792,713	Verified — Annual Water Quality Report
Ridgewood Water NJ0251001	surface water	250 PPM Very Hard USGS estimate: 169 PPM	61,700	Verified — Annual Water Quality Report
Fair Lawn Water Dept NJ0217001	surface water	169 PPM Moderately Hard	34,947	High Confidence — USGS Monitoring
Garfield Water Department NJ0221001	surface water	169 PPM Moderately Hard	30,487	High Confidence — USGS Monitoring
Mahwah Water Department NJ0233001	surface water	118 PPM Slightly Hard	26,777	High Confidence — USGS Monitoring

Veolia Water New Jersey Hackensack

NJ0238001

Soft

40 PPMsurface water792,713 servedVerified — Annual Water Quality Report

Source water: 169 PPM

Ridgewood Water

NJ0251001

Very Hard

250 PPMsurface water61,700 servedVerified — Annual Water Quality Report

Source water: 169 PPM

Fair Lawn Water Dept

NJ0217001

Moderately Hard

169 PPMsurface water34,947 servedHigh Confidence — USGS Monitoring

Garfield Water Department

NJ0221001

Moderately Hard

169 PPMsurface water30,487 servedHigh Confidence — USGS Monitoring

Mahwah Water Department

NJ0233001

Slightly Hard

118 PPMsurface water26,777 servedHigh Confidence — USGS Monitoring

Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

0765682 10965201 0745882 0764282 10954201 10952201 0767582 10977201 10962201 0742382 0740182 10913201

What This Means For You

Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Slightly Hard Water

Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.

Recommended Products

Water Hardness Test Kit

Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)

Salt-Free Water Conditioner

Our PickSpringWell Salt-Free Cartridge

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | How to Test Your Water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Montvale, NJ (07645).

Submit Your Data

Frequently Asked Questions

Is the water hard in Montvale, NJ (07645)?

The average water hardness in 07645 is 82 PPM (4.8 GPG), which is classified as slightly hard.

Do I need a water softener in 07645?

At 82 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 07645 safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve 07645?

Zip code 07645 in Montvale, New Jersey is served by 16 water systems.