How does Flowing Wells's water compare to the national average?

The USA national average is 151 mg/L. Flowing Wells (≈ 180+ mg/L) is 189 mg/L harder than average.

Flowing Wells Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

mixed

pH Level

7.5

neutral = 7.0

Lead

0.003 mg/L

✓ Below action level

TDS

440 mg/L

Est. Daily Cost

$0.91

energy & soap waste

Source: See methodology section below · Updated 2026

very hard180+ mg/LVery Hard · 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 Flowing Wells, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Flowing Wells	Soft Water City	Efficiency Loss
Kettle	4.7 yrs	8.5 yrs	-45%
Washing Machine	6.6 yrs	12 yrs	-45%
Water Heater	8.3 yrs	15 yrs	-45%

Regional Water Comparison

How Flowing Wells compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Flowing Wells, Arizona	≈ 180+ mg/L	3.4 ppt	🔴 Very Hard	mixed
Casas Adobes, Arizona	≈ 180+ mg/L	5.6 ppt	🔴 Very Hard	mixed
Catalina Foothills, Arizona	≈ 120–179 mg/L	5.8 ppt	🟠 Hard	mixed
Oro Valley, Arizona	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
Tucson, Arizona	≈ 180+ mg/L	4 ppt	🔴 Very Hard	groundwater

National Benchmark

How Flowing Wells compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Flowing Wells	≈ 180+ mg/L	🔴 High
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Flowing Wells's Water Unique?

Local geology and source profile

Source: MixedTDS: 440 mg/LpH: 7.5

The Flowing Wells Irrigation District serves around 15,876 residents in the Flowing Wells area of Tucson, Arizona, drawing water from the Tucson Basin aquifer through nine active wells at depths of 205 to 400 feet. The utility operates without major treatment plants, instead collaborating with the Arizona Department of Environmental Quality for monitoring. The water source is the Upper Santa Cruz sub-basin within the Tucson Active Management Area, a closed basin in southern Arizona's Basin and Range province.

The Tucson Basin aquifer features thick Quaternary alluvial fill derived from erosion of nearby ranges, exposing Paleozoic carbonates and Precambrian basement rocks. This geology imparts a hard character to the water due to dissolution of calcium- and magnesium-bearing minerals from limestone and dolomite formations during groundwater recharge and flow through porous gravels and sands. The resulting elevated dissolved solids are typical of the region's mineralised groundwater, which comes from the Tucson Basin aquifer.

Scale buildup is a primary concern in this water supply, forming thick deposits in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan - water heaters may fail prematurely by 30-50%. To mitigate these effects, regular vinegar descaling of appliances, installing sediment filters, and flushing water heaters annually are recommended. A whole-house water softener is strongly recommended to extend appliance life and improve cleaning performance. The Flowing Wells Irrigation District's latest water quality report details testing over the past five years for contaminants and compliance, with potential concerns including tert-Butyl alcohol, Butyl benzyl phthalate, inorganic mercury, and Atrazine at levels warranting monitoring, though within legal limits per state oversight.

Geology & Source: Tucson Basin aquifer; Quaternary alluvial deposits - sands, gravels, silts; Paleozoic limestone, dolomite; Precambrian granitic rocks produce hard water

Other Arizona Water Reports

Casas Adobes

≈ 180+ mg/L

🔴 Very Hard

Catalina Foothills

≈ 120–179 mg/L

🟠 Hard

Oro Valley

≈ 120–179 mg/L

🟠 Hard

Tucson

≈ 180+ mg/L

🔴 Very Hard

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

Frequently Asked Questions

Is Flowing Wells's water safe to drink?

Yes. Flowing Wells's water meets all federal safety standards. The hardness is ≈ 180+ mg/L (Very Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Flowing Wells?

At ≈ 180+ mg/L (Very Hard), Flowing Wells'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 45%.

How does Flowing Wells compare to the USA average?

The USA national average is 151 mg/L. Flowing Wells (≈ 180+ mg/L) is 189 mg/L above the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Flowing Wells 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.