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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Comprehensive water safety analysis • Updated June 2026
Scottsdale's water quality score of 52/100 falls below average, with 3 contaminants at concerning levels.
•All 3 historical violation(s) in Scottsdale have been resolved.
Caution Advised. We recommend using a certified water filter. Score: 52/100.
Want to understand your score better? Learn how scores are calculated →
Is your neighbor's water better? See how Scottsdale's grade of D (52/100) stacks up.
Guides matched to the contaminants found in your water
Above 50% of EPA limits
| Contaminant | Level Detected | EPA Limit | % of Limit | Status |
|---|---|---|---|---|
| Haloacetic Acids | 33.30 ug/L | 60.00 ug/L | 55.5% | Warning |
| Total Trihalomethanes | 44.15 ug/L | 80.00 ug/L | 55.2% | Warning |
| Copper | 0.709 mg/L | 1.30 mg/L | 54.5% | Warning |
8 contaminants tested • EPA SDWIS data • Click any contaminant for details
| Contaminant | Level Detected | EPA Limit | % of Limit | Status |
|---|---|---|---|---|
| Haloacetic Acids | 33.30 ug/L | 60.00 ug/L | 55.5% | Warning |
| Total Trihalomethanes | 44.15 ug/L | 80.00 ug/L | 55.2% | Warning |
| Copper | 0.709 mg/L | 1.30 mg/L | 54.5% | Warning |
| Nitrite | 0.422 mg/L | 1.00 mg/L | 42.3% | Safe |
| Nitrate | 4.21 mg/L | 10.00 mg/L | 42.1% | Safe |
| Chromium | 0.042 mg/L | 0.100 mg/L | 41.8% | Safe |
| Fluoride | 1.26 mg/L | 4.00 mg/L | 31.6% | Safe |
| Mercury | 0.0003 mg/L | 0.0020 mg/L | 16.7% | Safe |
Based on EPA data, Scottsdale's water quality is below average. A certified water filter can significantly reduce your exposure to harmful contaminants.
See water filters that remove these contaminants →Based on detected contaminants in your water
Removes chlorine, improves taste, and filters many organic compounds. Great starting point.
| Filter Type | Best For | Typical Price |
|---|---|---|
| Reverse Osmosis | Lead, PFAS, arsenic, nitrates (95-99% removal) | $150-300 |
| Under-sink carbon block | Chlorine, VOCs, many organics; some lead/PFAS models | $100-250 |
| Pitcher / faucet carbon | Chlorine, taste; NSF 53 models also reduce lead | $20-50 |
See our full water filter comparison for certified products matched to specific contaminants.
Our data covers your city's water system, but contaminants can vary at the tap. A home water test gives you exact results for your faucet.
Get a Certified Home Water Test — Tap ScoreWe may earn a commission when you purchase through our links, at no extra cost to you. All recommendations are based on our independent analysis of Scottsdale's water quality data.
Specific to the contaminants found in Scottsdale's EPA-reported water data
Elevated nitrate levels in Scottsdale's water pose particular risk to infants under six months. Nitrates can cause methemoglobinemia ("blue baby syndrome"), a condition where the blood cannot carry sufficient oxygen. Symptoms include bluish skin color, shortness of breath, and in severe cases, death. Formula-fed infants are at greatest risk. Pregnant women should also limit nitrate exposure. Boiling water does NOT remove nitrates—it actually concentrates them. Reverse osmosis or distillation systems effectively remove nitrates.
Past violations for Scottsdale's water system
monitoring
Copper - 2/4/2021
Resolvedmonitoring
Lead - 2/3/2025
Resolvedother
Copper - 2/4/2023
ResolvedHow to contact your water provider and access official reports
The primary water provider for Scottsdale is SCOTTSDALE WATER SYSTEM (Public Water System ID: AZ509855), serving approximately 244,541 residents. This utility is responsible for treating, testing, and delivering drinking water that meets EPA standards under the Safe Drinking Water Act. As a regulated public water system, it is required to conduct regular testing for over 90 contaminants and publish results in an annual Consumer Confidence Report (CCR) that must be made available to all customers by July 1 each year.
Your water utility is legally obligated to notify customers within 24 hours of any violation that poses an immediate health risk, and within 30 days for less urgent violations. If you are concerned about your water quality, you have the right to request testing data from your utility at any time. For independent verification, you can have your water tested at the tap by a state-certified laboratory. The EPA maintains a list of certified labs by state at epa.gov/dwlabcert. Home testing is particularly important because it captures contamination from your household plumbing that utility testing at distribution points would not detect.
Scottsdale Water Quality Score
Based on EPA contaminant data and compliance records
Scottsdale's water contains Haloacetic Acids at 56% of the EPA limit.
Best for Fluoride Removal
APEC Reverse Osmosis System
Multi-stage RO removes excess fluoride — the EPA-recommended treatment for fluoride.
Check Price on AmazonNot sure what filter you need?
Get a lab-certified water test to know exactly what's in your tap water.
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Based on contaminants detected in your water, these resources may be helpful:
Find the right filter for your Scottsdale water quality needs:
Understand the contaminants that may be present in Scottsdale's water supply and their health effects.
Matched to the contaminants actually detected in Scottsdale's water
Elevated nitrates were found in Scottsdale's water — only reverse osmosis or distillation removes them (boiling does not).
We may earn a commission when you purchase through our links, at no extra cost to you.
Understand your water better with our in-depth guides on contaminants, filtration, and water safety.
Scottsdale's 52/100 score measured against the Arizona average and the national benchmark
Scottsdale stays within every EPA legal limit, but Haloacetic Acids sits at 55.5% of its limit — the single contaminant most worth watching here.
Compared with the Arizona average of 78.5, Scottsdale scores 26.5 points below the state average. Among the 40 Arizona cities we track, Scottsdale ranks #39 — in the bottom third of the state.
Against the national benchmark of 80.8/100, Scottsdale comes in 28.8 points below the national average. The contaminant closest to its limit here is Haloacetic Acids, measured at 55.5% of the EPA limit — high enough that residents wanting extra protection should consider targeted filtration. At the other end, Mercury is its cleanest reading at just 16.7% of the limit.
For Scottsdale residents, the water is legally safe, but the elevated readings above are worth a quick decision: households with infants, pregnant women, or anyone immunocompromised get the most benefit from a targeted filter, while others may simply prefer it for taste and peace of mind.
Scottsdale's drinking water is managed by SCOTTSDALE WATER SYSTEM, which serves approximately 244,541 residents through surface water sources such as rivers, lakes, and reservoirs. Our analysis of 8 tested contaminants reveals a quality score of 52/100, placing Scottsdale below the state average, suggesting room for improvement.
While Scottsdale's water meets all EPA maximum contaminant levels, 3 contaminants are present at elevated levels (above 50% of EPA limits). This doesn't necessarily indicate a health risk, but residents who want additional protection may benefit from a home water filter.
Scottsdale's water system has 3 documented EPA violations in its compliance history. All have since been resolved, indicating the utility has addressed past issues. Compliance history is one of the factors in our scoring methodology.
This report is based on data from the EPA Safe Drinking Water Information System (SDWIS) and the EPA Enforcement and Compliance History Online (ECHO) database. Our scoring algorithm weighs contaminant analysis (50%), compliance history (30%), and infrastructure factors (20%). Data is sourced directly from public EPA records and Consumer Confidence Reports. We are an independent resource with no affiliation to water utilities or government agencies. Learn more about our methodology.
Common questions from Scottsdale, Arizona residents about their drinking water
Scottsdale's tap water scores 52/100 (Grade D), which falls below the national average of approximately 72. Multiple contaminants are at elevated levels. We strongly recommend using a water filter or bottled water for drinking and cooking. Contact your water utility for the latest testing data and consider independent testing at your tap.
Scottsdale's water has been tested for 8 contaminants spanning inorganic chemicals, disinfection byproducts, organic compounds, radionuclides, and microorganisms. No contaminants exceed EPA limits, but 3 are at elevated levels above 50% of EPA Maximum Contaminant Levels, including Haloacetic Acids, Total Trihalomethanes, Copper. See the full contaminant breakdown table above for detailed measurements and EPA limit comparisons.
Scottsdale has a water quality score of 52/100, earning a grade of D. This score is calculated using EPA SDWIS data and weighs three factors: contaminant levels (50% of score), regulatory compliance history (30%), and infrastructure factors (20%). The national average is approximately 72/100. Scottsdale's score of 52 is 20 points below the national average, suggesting residents should take additional precautions such as using a water filter. Learn more about how scores are calculated.
An activated carbon filter would be suitable for Scottsdale residents. Based on the contaminant profile, a carbon filter will effectively reduce chlorine taste, disinfection byproducts, and many organic compounds. Options range from pitcher filters ($20-40) to under-sink systems ($100-250). Even in cities with good water quality, a filter provides an additional layer of protection against contaminants that may enter water from your home's plumbing. View our water filter comparison guide for specific product recommendations.
Scottsdale's primary water system, SCOTTSDALE WATER SYSTEM (PWS ID: AZ509855), sources water from surface water such as rivers, lakes, or reservoirs. Surface water sources are more susceptible to contamination from agricultural runoff, industrial discharge, and stormwater, which is why extensive multi-step treatment including coagulation, sedimentation, filtration, and disinfection is required. This system serves approximately 244,541 residents.
Lead testing in Scottsdale shows levels within EPA action level guidelines. However, lead contamination is primarily a household plumbing issue rather than a water source issue. Lead can enter water from lead service lines, lead solder (used in homes built before 1986), and brass fixtures. Even if your city's water is lead-free at the treatment plant, your home's plumbing may introduce lead. Homes built before 1986 should consider testing their water at the tap. Running cold water for 30 seconds before drinking is always a good practice.
Yes, Scottsdale's water system has 3 documented EPA violations in its compliance history. All violations have been resolved, indicating the utility has taken corrective action. Violations can include exceeding contaminant limits, failure to conduct required testing, or failure to properly notify customers. Water utilities are required by the Safe Drinking Water Act to address violations and notify affected customers. You can look up the full violation history through the EPA's ECHO database or by contacting your water utility directly.
There are several options for testing your water in Scottsdale. For the most comprehensive results, use a state-certified laboratory (find one at epa.gov/dwlabcert). Home test kits like Tap Score provide EPA-certified lab analysis with easy-to-understand results. Basic test strips available at hardware stores can screen for common parameters like chlorine, pH, hardness, and lead, though they are less accurate than laboratory testing. You can also request the latest testing data directly from SCOTTSDALE WATER SYSTEM. Testing at your tap is important because it captures contamination from your household plumbing that city-level monitoring at distribution points does not detect.