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Which reports these are
Sierra Vista doesn't run its own water utility. State service-area data shows the largest civilian water systems serving the city are three private utilities: Liberty's Bella Vista City system (AZ0402010), Arizona Water Company's Sierra Vista system (AZ0402004) and Pueblo del Sol Water Company (AZ0402044). Smaller systems serve some areas, and Fort Huachuca runs its own system (AZ0402078).4 This page summarizes each main utility's newest water quality report, all covering 2025 test results.1,2,3 Every figure below belongs only to the utility named above its table. Check the name on your water bill.
All three utilities pump groundwater from wells. Liberty and Pueblo del Sol say their wells draw from the Sierra Vista Sub-Basin of the Upper San Pedro Basin. Arizona Water Company says its wells are spread across the Sierra Vista and Sulger areas.1,2,3
Liberty: Bella Vista City system
Liberty's 2025 report says the Bella Vista City system serves about 21,398 people from 18 wells and adds a small amount of chlorine at the well sites. The same report covers Liberty's Bella Vista South system.1
| What | 2025 report figure | Notes |
|---|---|---|
| Total hardness | Not published | 1 |
| Chlorine | 0.7–0.74 ppm; average 0.74 (2025) | Limit (MRDL) 4 ppm.1 |
| Nitrate | 0.42–3.4 ppm; average 2.9 (2025) | Limit 10 ppm.1 |
| Sodium | 13–20 ppm; average 15.73 (2021 sampling) | No federal limit.1 |
| Arsenic | 0.52–1.1 ppb; average 0.81 (2019 sampling) | Limit 10 ppb.1 |
| Lead and copper (2023) | 0 of 31 samples above either action level; copper 90th percentile 0.14 ppm | Copper action level 1.3 ppm.1 |
| PFAS | Tested June 2023, including PFOA and PFOS; none detected | 1 |
| Lithium (UCMR 5) | 9.0–10.6 ppb; average 9.6 | No federal limit.1 |
Arizona Water Company: Sierra Vista system
| What | 2025 report figure | Notes |
|---|---|---|
| Total hardness | Not published | 2 |
| Chlorine | 0.7–1.8 ppm; highest running average 1.1 (2025) | Limit (MRDL) 4 ppm.2 |
| Trihalomethanes (TTHM) / HAA5 | 8 ppb (7.8–8) / 1.5 ppb (ND–2.1) | Limits 80 and 60 ppb.2 |
| Nitrate | 0.1–3.6 ppm (2025) | Limit 10 ppm.2 |
| Sodium | 14–24 ppm (2024 sampling) | No federal limit.2 |
| Arsenic / fluoride | ND–1.1 ppb / 0.097–0.19 ppm (2024 sampling) | Limits 10 ppb and 4 ppm.2 |
| Lead and copper (2025) | Lead 90th percentile ND; copper 90th percentile 0.14 ppm; 0 samples above the action level | 2 |
| PFAS (2024 samples) | PFHxA ND–4.4 ppt (average 0.31); PFPeA ND–3 ppt (average 0.2) | No federal limit for either.2 |
| Lithium | ND–14.2 ppb; average 4.5 | No federal limit.2 |
| Violations | None in 2025 | The company reports zero monitoring, reporting, treatment technique or MCL violations.2 |
Pueblo del Sol Water Company
Pueblo del Sol's 2025 report says it uses four wells and two reservoirs.3
| What | 2025 report figure | Notes |
|---|---|---|
| Total hardness | Not published | The report explains hard water in general but gives no figure.3 |
| Nitrate | 0.27–0.87 ppm (2025) | Limit 10 ppm.3 |
| Uranium | 1.9–4.1 ppb (2025) | Limit 30 ppb.3 |
| Alpha emitters | 1–4.6 pCi/L (2025) | Limit 15 pCi/L.3 |
| Barium | 0.052–0.079 ppm (2025) | Limit 2 ppm.3 |
| Benzo(a)pyrene | ND–39 ppt (2025) | Limit 200 ppt. The report lists the typical source as storage tank and pipe linings.3 |
| Lead and copper (2025) | Lead ND at all 32 sites; copper 90th percentile 0.21 ppm (0.034–0.28); 0 of 32 above the action level | The company says no lead service lines were identified.3 |
ppm = parts per million (mg/L). ppb = parts per billion (µg/L). ppt = parts per trillion (ng/L). ND = not detected. Utilities may sample some substances less than once a year, so the sampling year is shown where it isn't 2025.
What isn't published
None of the three reports lists total hardness or total dissolved solids, so we have no published hardness figure for Sierra Vista.1,2,3 We won't guess one. Pueblo del Sol's report also lists no chlorine, sodium or PFAS figures.3 For a reading at your tap, test it or ask a dealer to.
Fort Huachuca
Fort Huachuca (ZIP 85613) runs its own water system (AZ0402078), separate from the Sierra Vista utilities.4 We couldn't find a posted water quality report for it. The Army's Fort Huachuca drinking water page says water quality reports aren't required at the installation, and it points to the Defense Department's on-base PFAS drinking water results instead.5 So there's no published hardness figure for on-post water.
What this means for home treatment
- Scale: with no published hardness figure, test your tap before sizing or setting a softener. See how to set softener hardness and signs you need a softener.
- Taste and dissolved minerals: TDS reduction is a required claim for RO systems certified to NSF/ANSI 58. See RO system cost.6
- Chlorine taste: filters certified to NSF/ANSI 42 target chlorine taste and odor.7
- Well water nearby: if your home is on a private well, none of these reports covers it. See Arizona well water.
Frequently asked questions
How hard is Sierra Vista water?
None of the three main Sierra Vista utilities lists hardness in its 2025 water quality report. That's Liberty's Bella Vista system, Arizona Water Company and Pueblo del Sol Water Company. So there's no published hardness figure. Test your own tap, or ask a dealer to, before you size or set a softener.
Who supplies water in Sierra Vista?
State service-area data shows no city-run water system in Sierra Vista. The largest civilian systems serving the city are Liberty's Bella Vista City system, Pueblo del Sol Water Company and Arizona Water Company's Sierra Vista system. Smaller systems such as Southland Utilities (Golden Acres) and East Slope Water Company serve some areas, and Fort Huachuca runs its own system. Check the name on your water bill.
Where does Sierra Vista's tap water come from?
All three main utilities pump groundwater from wells. Liberty and Pueblo del Sol say their wells draw from the Sierra Vista Sub-Basin of the Upper San Pedro Basin. Arizona Water Company says its wells are located throughout the Sierra Vista and Sulger areas. Liberty and Arizona Water Company report chlorine disinfection.
Is there PFAS in Sierra Vista water?
It depends on the utility. Arizona Water Company's report lists two PFAS without federal limits, PFHxA (up to 4.4 ppt) and PFPeA (up to 3 ppt), from 2024 samples. Liberty says PFAS tested in its Bella Vista City water in June 2023, including PFOA and PFOS, were not detected. Pueblo del Sol's 2025 report lists no PFAS results and says its UCMR 5 data is available on request.
How much sodium is in Sierra Vista water?
Liberty's Bella Vista City system lists 13 to 20 ppm (2021 sampling), and Arizona Water Company lists 14 to 24 ppm (2024 sampling). Pueblo del Sol's report doesn't list sodium. There is no federal limit for sodium.
Does this cover Fort Huachuca?
No. State service-area data shows Fort Huachuca runs its own water system (AZ0402078). We couldn't find a posted water quality report for it. The Army's Fort Huachuca drinking water page says water quality reports aren't required at the installation, and it points to the Defense Department's on-base PFAS drinking water results instead. So there's no published hardness figure for on-post water.
More water quality reports: Tucson · Yuma · Phoenix · Glendale · Well water treatment in Arizona · All cities
Sources
- Liberty (Bella Vista Water) Corp.: 2026 Consumer Confidence Report on Water Quality for 2025 (Bella Vista City and Bella Vista South), PDF
- Arizona Water Company: 2025 Annual Water Quality Report for Sierra Vista (PWSID AZ0402004), PDF
- Pueblo del Sol Water Company: Water Quality Report, Reporting Year 2025, PDF
- Arizona Department of Water Resources: Community Water System service areas
- U.S. Army Environmental Command: Fort Huachuca drinking water and PFAS page
- NSF: NSF/ANSI 58 reverse osmosis systems
- NSF: NSF/ANSI 42, 53 and 401 filtration standards
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