Avondale, Arizona
Avondale Water Quality
City wells in the West Salt River Valley do most of the work; about one-sixth arrives as Colorado River water through Phoenix. The 2024 CCR's story is arsenic under the limit, a TTHM LRAA of 32, and Drought Stage 1 on the supply side — not a single hardness slogan.
About 84% Avondale wells, about 16% Phoenix-delivered CAP in the 2024 report. Same city, two columns of results.
The short answer
Avondale addresses on the City of Avondale system (PWS ID AZ0407088) drink a blend: roughly 84% city groundwater from the West Salt River Valley Sub-Basin and about 16% treated Colorado River water delivered through Phoenix.
The 2024 report's Avondale-side arsenic range is ND–4.9 ppb (average 2.23) against a 10 ppb MCL. The highest TTHM locational running annual average is 32 ppb. Drought Stage 1 and a Colorado River Tier 1 shortage note are supply context, not a finding that the tap failed an MCL. Confirm the utility on the bill before buying equipment for a different CCR.
Get a free test
Tell us your Avondale address. We confirm coverage and which utility serves the meter first, then schedule a licensed technician to test at your tap — no charge, no obligation.
What filtration does — and does not
Softening, carbon and reverse osmosis solve different problems. Avondale's report is an arsenic-and-blend story with published UCMR5 PFAS monitoring — not a one-filter cure.
Where Avondale water comes from
A municipal system with a Phoenix interconnect — not EPCOR Agua Fria and not Peoria's plant.
West Salt River Valley groundwater wells
About 84% of what the 2024 report labels as City of Avondale delivered water comes from wells in the West Salt River Valley Sub-Basin aquifer. The city pumps, treats and disinfects that share before it reaches the distribution system.
Colorado River water via the Phoenix interconnect
Roughly 16% of delivered water arrives as treated Colorado River water through an agreement with the City of Phoenix (PWS AZ0407025) — the North Avondale Water Supply interconnect. The CCR prints Phoenix-side results in a separate column for that reason.
Drought Stage 1 is a supply story, not a tap shutoff
The 2024 report states Avondale remains in Drought Stage 1 in response to Colorado River drought, notes a Bureau of Reclamation Tier 1 shortage for 2025 operations, and says Stage 1 does not mean mandatory reductions at the tap. Softener sizing still starts from your meter, not the river headline.
Lead service line inventory — October 2024
Avondale completed an initial inventory of more than 26,000 service connections in October 2024, including galvanized lines that may require replacement. Lead's 90th percentile on Avondale's 2022 tap sampling was not detected among 30 sites.
What the 2024 Avondale CCR actually says
Limits are fixed. The results next to them are from the City of Avondale 2024 Water Quality Report — system-level figures, not a reading at your tap. A later report supersedes them.
Arsenic — low on the Avondale side, higher on Phoenix-delivered
For City of Avondale water the 2024 table lists arsenic ND–4.9 ppb (average 2.23) against an MCL of 10. The Phoenix-delivered column shows ND–8.3 ppb (average 6). Both sides meet the MCL; the blend at your address is why a free tap test still matters.
Nitrate — mid-range, not an infant-risk exceedance on the average
Avondale nitrate (as nitrogen) is listed at 2.15–5.96 ppm with an average of 4.03 against an MCL of 10. The report repeats EPA's infant guidance for levels above 10. Households with infants still confirm their own tap rather than treating the city average as a kitchen reading.
Disinfection byproducts — TTHM LRAA 32, HAA5 LRAA 4.7
On the Avondale distribution side, total trihalomethanes show a highest locational running annual average of 32 ppb (sample range 12–65) against an 80 ppb MCL. Haloacetic acids show a highest LRAA of 4.7 ppb (ND–14) against 60. Free chlorine residual averaged about 0.97 ppm (0.4–1.84).
UCMR5 PFAS — detections published, MCLs still coming
Avondale's UCMR5 table (sampling began April 2024, finished January 2025) lists detections including PFOA ND–0.014 and PFOS ND–0.012 in the units the CCR prints, plus lithium 40.7–114 ppb. EPA's enforceable 4.0 ppt MCLs for PFOA and PFOS still have a later compliance date. Confirm the utility on the bill before buying a PFAS filter on a neighbor's reading.
Fluoride and chromium
Fluoride on the Avondale side is ND–1.1 ppm (average 0.27) against an MCL of 4.0. Total chromium is ND–15 ppb (average 4.5) against 100. Neither is Avondale's headline purchase driver.
Monitoring notices in the 2024 report
The CCR includes Tier 3 public-notice language for missed MRDL monitoring in January 2024 and notes intermittent Revised Total Coliform Rule sampling that was corrected in February 2024 with negative results. Those are reporting/monitoring notices, not MCL exceedances for finished-water contaminants in the main tables.
Why Avondale is not Surprise or Peoria with a different ZIP
West Valley cities share rivers and do not share water reports. Surprise addresses on our Surprise page are read through EPCOR's Agua Fria district. Peoria publishes its own municipal CCR. Phoenix is the interconnect partner on roughly one-sixth of Avondale's delivered water — a separate PWS column in the same report, not a reason to paste Phoenix averages onto an Avondale softener quote.
Where these figures come from
Everything on this page traces to primary sources. Independent compilations of water quality data exist and are not used here.
- City of Avondale — 2024 Water Quality Report (PDF) — PWS AZ0407088; Phoenix-delivered column PWS AZ0407025; arsenic, nitrate, TTHM/HAA5, UCMR5, drought note.
- City of Avondale — Water Quality landing page — current and prior CCRs.
- EPA — PFAS National Primary Drinking Water Regulation — 4.0 ppt MCLs for PFOA and PFOS.
Matching treatment to the finding
Avondale's report supports a tap test and an honest arsenic conversation — not a one-filter cure for the whole CCR.
Hardness and scale: test the tap, not the river story
Avondale's governing published tables emphasize arsenic, nitrate and disinfection byproducts more than a single hardness band. A softener quote still needs a grains reading at your kitchen sink — especially where the Phoenix interconnect share varies by pressure zone.
Arsenic: RO at the drinking tap when your well blend sits high
Reverse osmosis certified for arsenic reduction is the household tool when a tap sits toward the upper end of the system's range. City averages are not a reading at every faucet.
PFAS: match certification to the compound, not the headline
If a household wants a margin after reading UCMR5 detections, NSF/ANSI 53 or 58 listings that name PFOA and PFOS reduction are the check — not box art that only says "PFAS."
Confirm City of Avondale vs a private West Valley utility
Neighboring addresses can sit on Liberty, EPCOR or another city. The CCR on this page is City of Avondale PWS AZ0407088. Wrong utility means wrong table.
How the free test works
A licensed technician tests at your kitchen tap, walks the plumbing, and tells you which of the findings above applies to your house and which does not. There is no charge and no obligation.
Seamless Home is the licensed contractor of record on the work that follows. Installation is performed by vetted installing partners engaged as our subcontractors, and the workmanship obligation stays with us. Coverage is confirmed per service area rather than promised as blanket availability.
A softener or RO unit needs a legal drain connection — where a water softener is allowed to discharge sets out the indirect-waste rule that decides where it goes.
What a water treatment job with us covers
Installation and replacement of whole-home and point-of-use treatment, specified against what your water actually contains.
Sediment filtration
Installation of the first stage that protects everything downstream of it, sized to the service line and the household draw.
Softening
Installation of ion-exchange softening where hardness is the problem, including the drain connection the plumbing code treats as indirect waste.
Carbon filtration
Installation of carbon stages for taste, odour and disinfection by-products, specified from your utility's own water quality report.
Reverse osmosis
Point-of-use installation at the kitchen sink where the target is dissolved solids rather than whole-home flow.
Disinfection
Installation of UV or equivalent treatment where the supply is a private well or is otherwise not continuously disinfected.
System replacement
Replacing equipment that has reached the end of its service life, including the discharge and air gap details an inspector looks at.
This is installation and replacement work, specified from a published water quality report or a test of your supply — not from a sales chart. Coverage is confirmed per service area rather than promised as blanket availability.
What the work actually looks like
Treatment equipment is plumbing. Most of the job is the connection, the drain and the code detail behind it.
Avondale water, answered plainly
Who provides Avondale drinking water?+
Most Avondale addresses are on the City of Avondale public water system, PWS ID AZ0407088. About 16% of delivered water in the 2024 report is treated Colorado River water delivered through the City of Phoenix interconnect. Confirm the utility name on your bill before treating any West Valley average as your tap.
Is Avondale water hard?+
The 2024 CCR's main regulated tables do not lead with a single citywide hardness number the way some West Valley reports do. Scale complaints are still common in the desert; a free test at your tap is the design input for a softener, not a borrowed Peoria or Surprise figure.
Is there arsenic in Avondale water?+
Yes at low levels that meet the federal MCL. The 2024 report lists arsenic ND–4.9 ppb (average 2.23) for City of Avondale water and ND–8.3 ppb (average 6) for the Phoenix-delivered column, against an MCL of 10.
Is there PFAS in Avondale water?+
Avondale's UCMR5 monitoring (April 2024–January 2025) published detections for several PFAS compounds in the CCR's unregulated table, including ranges for PFOA and PFOS. Those are monitoring results under UCMR5, not the same as a finished-water MCL violation under the 2024 EPA rule, which still has a later compliance deadline.
Does Drought Stage 1 mean my water is unsafe?+
No. The city's 2024 report says Drought Stage 1 does not mean mandatory water reductions or shortage at the tap. It is a supply-planning and conservation posture tied to Colorado River conditions, including the Tier 1 shortage noted for 2025 operations.
Where do these figures come from?+
The City of Avondale 2024 Water Quality Report (Consumer Confidence Report) for PWS AZ0407088, including the Phoenix-delivered column for PWS AZ0407025. Independent water-quality aggregators are not the source used here. A later report supersedes these figures.
Related resources
Home water purification and treatment
The national service page behind this one.
Learn more →Surprise water quality
Neighbouring West Valley — EPCOR Agua Fria, not Avondale municipal.
Learn more →Peoria water quality
Neighbouring municipal CCR — different PWS from Avondale.
Learn more →Phoenix water quality
Interconnect partner system figures for the valley core.
Learn more →Where a water softener can discharge
Indirect-waste rules for treatment drain lines.
Learn more →All home services
Water, battery, HVAC and solar under one licensed contractor of record.
Learn more →Get a free test at your tap
A licensed technician tests at your kitchen tap and tells you which of the findings above applies to your house — arsenic, disinfection byproducts, hardness or none of them. No charge, no obligation, and coverage confirmed at your address first.
Get a free test