Tucson Tap Water Quality Report
Tucson's water has 5 contaminants above EPA MCLGs. We recommend using a certified water filter.
3 other systems serving parts of Tucson report results above guidelines — check which system bills you. RIO VISTA MOBILE HOME PARK (1 above guidelines), ORACLE NORTH HOME OWNERS ASSOC (1 above guidelines), WINTERHAVEN WATER DEVELOPMENT (2 above guidelines)
Other systems listed for Tucson with results above guidelines: DESERT PARADISE MHP LLC (1 above guidelines), LORD AZ WATER 2 - WINCHESTER TRAILS (2 above guidelines), MARANA MUNICIPAL - AIRLINE LAMBERT (4 above guidelines), CLOUD NINE WATER COMPANY (2 above guidelines), SUNLAND WATER COMPANY (1 above guidelines), MARANA MUNICIPAL - HARTMAN VISTAS (5 above guidelines), DRAGOON WATER COMPANY (2 above guidelines), VALLE VERDE DEL NORTE (1 above guidelines)
Water system
TUCSON CITY OF
15 other systems also serve parts of Tucson. 13 other systems are listed for Tucson. See their figures
People Served
732,906
Health-based violations since 2020
0
TUCSON CITY OF. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Aug 2025 · TUCSON CITY OF
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Tucson Tap Water Safe to Drink?
We strongly recommend using a certified water filter to reduce exposure: Tucson's water has 5 contaminants above EPA health-based guidelines. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Tucson's water.
TUCSON CITY OF, Tucson's water system, serves 732,906 people. 15 other systems also serve parts of Tucson. 13 other systems are listed for Tucson. Each system's results are listed under its own name, never added to TUCSON CITY OF's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for TUCSON CITY OF is from Aug 2025.
In EPA's 2023–2026 UCMR 5 testing, TUCSON CITY OF measured lithium at up to 63.7 µg/L, which EPA counts as above its health reference level of 10 µg/L. That level is a screening value EPA uses to decide what to study further, not a legal limit, and this result does not change this page's water-quality summary.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Arizona
Tucson Water Service Areas
What these numbers actually mean for Tucson, AZ
We read Tucson, AZ’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 5 contaminants above EPA MCLGs and 12 contaminants with an EPA health goal detected in some samples (no level on file)
- 118 results on file
- 23 PFAS compounds on record
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Recommended Water Filters for Tucson
Based on Tucson's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
AquaTru
Carafe
NSF Certified:
Flow Rate
0.3 gpm
Daily Production
4 gpd
Highlights:
- Verified PFAS reduction
- Glass collection vessel
- Plug-and-play installation
- NSF-53, NSF-42, NSF-58, NSF-401, NSF-372 certified
Removes 17 contaminants:
+12 more
Arsenic, 83+ contaminants, Copper, Total THMs, Chloroform, Chloride, Sulfate, Nitrate (as N), Molybdenum, Barium, Strontium, Uranium
Culligan
ZeroWater
NSF Certified:
Flow Rate
1.9 gpm
Daily Production
1 gpd
Highlights:
- Compact design
- Easy to set up
- Affordable
- NSF-42, NSF-53, NSF-401 certified
Removes 19 contaminants:
+14 more
Strontium, Molybdenum, Fluoride, Uranium, Lead, Total PFAS, Chlorine, 25, Phosphorus, Bicarbonate, Calcium, Carbonate, Magnesium, Sodium
Waterdrop
G3 P600
NSF Certified:
Flow Rate
600 gpm
Daily Production
600 gpd
Highlights:
- Space-saving design
- Good contaminant reduction
- NSF-58 certified
Removes 4 contaminants:
Verify Your Water Quality with Independent Testing
With 5 contaminants above EPA MCLGs and 12 contaminants with an EPA health goal detected in some samples (no level on file), independent laboratory testing provides a second opinion and can track changes over time.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
With 5 contaminants above health guidelines, you may want to explore water purification options. Learn how to make distilled water at home for applications like humidifiers, CPAP machines, and baby formula.
What Tucson's water readings can explain
Utility-reported data for Tucson includes a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Tucson, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Tucson? Public-water results do not apply to private wells. See Pima County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Tucson
Tucson's tap water measures 10.5 grains per gallon (180.0 mg/L) — hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for 10.5 gpg water in Tucson — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For Arizona as a whole, read water softener cost in Arizona — priced against the plumber wage published for the state.
Frequently Asked Questions About Tucson Tap Water
Tucson's water has 5 contaminants above EPA MCLGs. We strongly recommend using a certified water filter to reduce exposure to these contaminants. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Tucson's water.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach TUCSON CITY OF. For a problem with your water now (discolored water, no water, low pressure, a leak), contact TUCSON CITY OF directly.
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