La Crescenta-Montrose Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

7.7

neutral = 7.0

Lead

0.005 mg/L

✓ Below action level

TDS

280.8 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

0–60

mg/L

Soft

61–120

mg/L

Moderately Hard

121–180

mg/L

Hard

180+

mg/L

Very Hard

Appliance Damage Report

In La Crescenta-Montrose, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In La Crescenta-Montrose	Soft Water City	Efficiency Loss
Kettle	6.8 yrs	8.5 yrs	-20%
Washing Machine	9.6 yrs	12 yrs	-20%
Water Heater	12 yrs	15 yrs	-20%

Regional Water Comparison

How La Crescenta-Montrose compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ La Crescenta-Montrose, California	≈ 120–179 mg/L	189.9 ppt	🟠 Hard	reservoir
Tujunga, California	≈ 120–179 mg/L	5.1 ppt	🟠 Hard	groundwater
La Canada Flintridge, California	190 mg/L	0 ppt	🔴 Very Hard	reservoir
Sunland, California	≈ 120–179 mg/L	2.9 ppt	🟠 Hard	mixed
Burbank, California	≈ 180+ mg/L	73.4 ppt	🔴 Very Hard	reservoir

National Benchmark

How La Crescenta-Montrose compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ La Crescenta-Montrose	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes La Crescenta-Montrose's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 280.8 mg/LpH: 7.7

La Crescenta-Montrose, in Los Angeles County, California, is served by Glendale Water & Power, which supplies this unincorporated community in the Crescenta Valley. The utility sources water from a blend of imported surface water via the Metropolitan Water District of Southern California (MWD), including the Colorado River Aqueduct and State Water Project, supplemented by local groundwater from wells in the San Fernando and San Gabriel groundwater basins. Treatment occurs at facilities including the Griffith Park Treatment Plant and MWD's Skinner and Jensen plants, ensuring compliance with state and federal standards before distribution to approximately 200,000 residents across Glendale and adjacent areas including La Crescenta-Montrose.

The primary imported water originates from the Colorado River Basin, spanning the Rocky Mountains through desert canyons underlain by Paleozoic limestone and Mesozoic sedimentary formations, and from the Sacramento-San Joaquin Delta via the State Water Project. Locally, the Verdugo and San Gabriel foothill aquifers overlay alluvial fans derived from granitic and metamorphic bedrock of the Peninsular Ranges Batholith (Jurassic-Cretaceous). This geological mix — rich in carbonate rocks and evaporitic soils — dissolves calcium and magnesium into the water, yielding a hard supply with elevated mineral content that influences taste, scaling, and soap efficiency.

Hard water in this area promotes scale buildup in pipes, water heaters, dishwashers, washing machines, and faucets, where mineral deposits reduce efficiency and lifespan. White residue on glassware and reduced lathering are common. Regular vinegar descaling, installing drain screens, and flushing water heaters every 6–12 months help mitigate effects. A water softener is recommended for households experiencing pronounced scaling. Water quality meets EPA standards, with pH typically 7.5–8.5; the utility complies with lead and copper rules through corrosion control, and disinfection byproducts are managed below MCLs using coagulation, filtration, and chloramine disinfection.

Geology & Source: Colorado River Aqueduct watershed — Paleozoic/Mesozoic limestone and dolomite; local groundwater in Verdugo Mountains alluvial sediments over Cretaceous granitic bedrock; carbonate-rich rocks and evaporitic soils produce hard supply

Other California Water Reports

Tujunga

≈ 120–179 mg/L

🟠 Hard

La Canada Flintridge

190 mg/L

🔴 Very Hard

Sunland

≈ 120–179 mg/L

🟠 Hard

Burbank

≈ 180+ mg/L

🔴 Very Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

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Frequently Asked Questions

Is La Crescenta-Montrose's water safe to drink?

Yes. La Crescenta-Montrose's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in La Crescenta-Montrose?

At ≈ 120–179 mg/L (Hard), La Crescenta-Montrose's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does La Crescenta-Montrose compare to the USA average?

The USA national average is 151 mg/L. La Crescenta-Montrose (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for La Crescenta-Montrose is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.