How does Pleasant Hill's water compare to the national average?

The USA national average is 151 mg/L. Pleasant Hill (≈ 0–59 mg/L) is 121 mg/L softer than average.

Pleasant Hill Water Hardness & Quality Report (2026)

Water Hardness

soft

~0–59 mg/L

Soft

estimated · not lab-verified

Source

groundwater

pH Level

neutral = 7.0

Lead

0.007 mg/L

✓ Below action level

TDS

410.9 mg/L

Est. Daily Cost

$0.08

energy & soap waste

Source: See methodology section below · Updated 2026

soft~0–59 mg/LSoft · 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 Pleasant Hill, your appliances are currently losing 4% efficiency due to mineral buildup.

Appliance	In Pleasant Hill	Soft Water City	Efficiency Loss
Kettle	8.2 yrs	8.5 yrs	-4%
Washing Machine	11.5 yrs	12 yrs	-4%
Water Heater	14.4 yrs	15 yrs	-4%

Regional Water Comparison

How Pleasant Hill compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Pleasant Hill, California	≈ 0–59 mg/L	6.2 ppt	🟢 Soft	groundwater
Walnut Creek, California	≈ 120–179 mg/L	6.3 ppt	🟠 Hard	groundwater
Concord, California	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Lafayette, California	≈ 180+ mg/L	3.6 ppt	🔴 Very Hard	mixed
Alamo, California	≈ 120–179 mg/L	3.3 ppt	🟠 Hard	groundwater

National Benchmark

How Pleasant Hill compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Pleasant Hill	≈ 0–59 mg/L	🟢 None
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Pleasant Hill's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 410.9 mg/LpH: 8

Pleasant Hill, California, in Contra Costa County, receives drinking water primarily from the East Bay Municipal Utility District (EBMUD) for most residents, with the Contra Costa Water District (CCWD) serving other areas and Martinez Water District (MWD) in select zones. EBMUD sources water from the Mokelumne River via three aqueducts, treating it at plants including the El Cerrito Terminal Treatment Facility. CCWD draws from the Sacramento-San Joaquin Delta, processed at the Jones Treatment Plant; the combined service area covers approximately 1,430,200 people across the East Bay region.

The watershed spans the Mokelumne River basin in the Sierra Nevada, flowing through granitic terrains into storage reservoirs — including Pardee Reservoir — before aqueduct delivery. CCWD's supply originates in the vast Sacramento-San Joaquin Delta, influenced by upstream Sierra geology. The fractured granites and metavolcanic rocks of the Paleozoic Foothills Terrane contain minimal limestone or dolomite, imparting a very soft character; EBMUD data confirms hardness at just 18 mg/L as CaCO3 (1.1 gpg), resulting in minimal dissolved solids and a low-alkalinity profile.

As a very soft supply, scaling is negligible — water heaters, dishwashers, and coffee makers face no mineral buildup risk. Soap lathers easily, reducing detergent use. No water softener is needed or recommended; however, soft water can corrode pipes over time if pH is unbalanced, so monitor for potential lead leaching in older homes and perform annual fixture checks. Water quality exceeds EPA standards with zero MCL violations; treatment includes ozonation, filtration, and chloramination; no notable PFAS, lead, or copper issues; hardness confirmed at 18 mg/L by EBMUD; pH is stable.

Geology & Source: Mokelumne River and Sacramento-San Joaquin Delta watershed; granitic and metavolcanic rocks of the Paleozoic Foothills Terrane — minimal carbonate formations yield very soft, low-mineral supply

Other California Water Reports

Walnut Creek

≈ 120–179 mg/L

🟠 Hard

Concord

≈ 120–179 mg/L

🟠 Hard

Lafayette

≈ 180+ mg/L

🔴 Very Hard

Alamo

≈ 120–179 mg/L

🟠 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.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Pleasant Hill's water safe to drink?

Yes. Pleasant Hill's water meets all federal safety standards. The hardness is ≈ 0–59 mg/L (Soft), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Pleasant Hill?

Pleasant Hill's water is soft at ≈ 0–59 mg/L. A water softener is generally not necessary, though a carbon filter can improve taste and remove any remaining chlorine.

How does Pleasant Hill compare to the USA average?

The USA national average is 151 mg/L. Pleasant Hill (≈ 0–59 mg/L) is 121 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 Pleasant Hill 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.