Drinking water quality · 2024
· Verified
· PWSID AZ0407098
What's in Scottsdale, AZ tap water
Every one of the 14 core regulated contaminants reported for Scottsdale, AZ came in below its federal limit.
- !1 contaminant within 20% of a limit
- !14 of 27 core regulated contaminants reported — 13 never appear in this report
- ✓Nothing over a federal limit
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −0 contaminants at or above a federal limit
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −8 core regulated contaminants never reported (14/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Arsenic84% of the federal limit8.4 ug/L · limit 10 ug/L
A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
higher than 90% of U.S. systems
+32 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| TTHM | 52.8 ug/L | 80 ug/L |
| Nitrate | 3.4 mg/L | 10 mg/L |
| HAA5 | 20 ug/L | 60 ug/L |
| Turbidity | 0.27 NTU | 1 NTU |
| Chlorine | 0.65 mg/L | 4 mg/L |
| Uranium | 4.2 ug/L | 30 ug/L |
| Lead | 2 ug/L | 15 ug/L |
| Copper | 170 ug/L | 1300 ug/L |
| Fluoride | 0.4 mg/L | 4 mg/L |
| Chromium | 9.2 ug/L | 100 ug/L |
| Selenium | 2.3 ug/L | 50 ug/L |
| Barium | 79 ug/L | 2000 ug/L |
| Gross Alpha | 0.5 pCi/L | 15 pCi/L |
| Bromide | 0.08 mg/L | — |
| Chloride | 170 mg/L | — |
| Sulfate | 253 mg/L | — |
| Aluminum | 0.1 mg/L | — |
| Calcium | 88 mg/L | — |
| Germanium | 0.024 ug/L | — |
| Iron | 0.04 mg/L | — |
| Magnesium | 37 mg/L | — |
| Manganese | 0.61 ug/L | — |
| Nickel | 1 ug/L | — |
| Sodium | 112 mg/L | — |
| Zinc | 0.056 mg/L | — |
| Total Coliform | 0.2 % | — |
| Alkalinity | 250 mg/L | — |
| pH | 8.2 | — |
| Temperature | 91 | — |
| TOC | 4.1 mg/L | — |
| Total Dissolved Solids | 710 mg/L | — |
| PFBS | 3.2 ng/L | — |
What this report doesn't tell you
13 of the 27 contaminants a community water system normally reports do not appear anywhere in Scottsdale, AZ's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Scottsdale, AZ
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFBS
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Scottsdale, AZ's drinking water comes from ground water, drawn from 24 sources.
Source
- IN-U070980SI - CAP CANAL
- WL-55-626823 -
- WL-55-626827 -
- WL-55-626830 -
- + 20 more
Treatment
- TP001 - CAP
- TP002 - CL2
- TP232 - CL2, AS
- + 5 more
Distribution
Also buys water from PHOENIX CITY OF.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based7 violations on record · most recent May 1999resolved
- Other1 violation on recordresolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗