Fluoride is not added to Santa Clarita tap water, according to SCV Water. Its 2026 water quality report says any fluoride detected is naturally occurring, and for 2025 it measured an average of 0.4 mg/L in local groundwater (range 0.2 to 0.7) and 0.3 mg/L in imported surface water (partly 2024 data). California’s legal limit is 2 mg/L.
SCV Water’s reports cover 2019 to 2025, and for 2019 to 2022 they give fluoride separately for its Valencia, Santa Clarita and Newhall water divisions. Every fluoride level comes from SCV Water’s annual Consumer Confidence Reports. Levels are in milligrams per liter (mg/L), which for drinking water is the same as parts per million (ppm).
Does Santa Clarita water have fluoride added?
No fluoride is added to Santa Clarita water, but SCV Water does detect naturally occurring fluoride: a 2025 average of 0.4 mg/L in groundwater and 0.3 mg/L in surface water. All seven SCV Water reports from 2020 to 2026 carry the same sentence: “Fluoride is not added to your drinking water. Any fluoride detection is naturally occurring in the groundwater.” The reports cover SCV Water customers and Los Angeles County Waterworks District #36, which SCV Water supplies wholesale.
Santa Clarita water fluoride levels in 2025
These are the latest figures, from the report SCV Water published in 2026. Since the 2024 report (2023 data), SCV Water has published fluoride by water source rather than by division.
| Water source (as named in the report) | Lowest (mg/L) | Highest (mg/L) | Average (mg/L) |
|---|---|---|---|
| SCV Water, groundwater (local wells) | 0.2 | 0.7 | 0.4 |
| SCV Water, surface water (imported, treated at SCV Water’s two plants) | 0.3 | 0.3 | 0.3 |
| LA County Waterworks District #36 (Hasley Canyon, Val Verde) | 0.5 | 0.7 | 0.6 |
The report notes that some of the surface water data is from 2024. SCV Water says its customers receive a combination of imported water and local groundwater, “served in various proportions in our service area.”
Fluoride in Valencia, Saugus, Canyon Country and Newhall water
The last year SCV Water reported fluoride by division was 2022.
| Division | Areas served, per the report | Water mix in 2022 | Fluoride range (mg/L) | Average (mg/L) |
|---|---|---|---|---|
| Valencia Water Division | Valencia, Stevenson Ranch, and parts of Castaic, Saugus and Newhall | 49% imported, 50% groundwater, 1% recycled (landscape) | 0.2 to 0.8 | 0.6 |
| Santa Clarita Water Division | Part of the City of Santa Clarita and unincorporated areas, including Saugus, Canyon Country and Newhall | About 83% imported, 17% groundwater | 0.3 to 0.5 | 0.4 |
| Newhall Water Division, Castaic | Castaic area | 23% imported, 77% groundwater | 0.4 to 0.5 | 0.4 |
| Newhall Water Division, Newhall | Newhall area | 11% imported, 89% groundwater | 0.3 to 0.4 | 0.4 |
| Newhall Water Division, Pinetree | Pinetree area | 79% imported, 21% groundwater | highest 0.3 (lowest and average NA in report) | NA in report |
| Newhall Water Division, Tesoro | Tesoro del Valle area | 100% imported | NA in report | NA in report |
| LA County Waterworks District #36 | Hasley Canyon and Val Verde | The district’s own well was under repair; served from an adjacent system’s well | 0.6 to 0.7 | 0.7 |
Saugus, Newhall and Castaic are each listed under more than one division.
How Santa Clarita fluoride levels changed, 2019 to 2025
Averages by year, with the range in brackets. The 2020 and 2021 reports (2019 and 2020 data) label the middle figure “typical” rather than “average.” “NA in report” means the report printed NA.
| Division | 2019 | 2020 | 2021 | 2022 |
|---|---|---|---|---|
| Valencia Water Division | 0.5 (0.2 to 1.0) | 0.6 (0.2 to 0.9) | 0.6 (0.2 to 0.9) | 0.6 (0.2 to 0.8) |
| Santa Clarita Water Division | 0.4 (0.3 to 0.5) | 0.4 (0.3 to 0.6) | 0.4 (0.3 to 0.5) | 0.4 (0.3 to 0.5) |
| Newhall Water Division, Castaic | 0.5 (0.4 to 0.5) | 0.5 (0.5 to 0.5) | 0.5 (0.4 to 0.5) | 0.4 (0.4 to 0.5) |
| Newhall Water Division, Newhall | 0.3 (0.3 to 0.4) | 0.4 (0.3 to 0.4) | 0.3 (0.3 to 0.3) | 0.4 (0.3 to 0.4) |
| Newhall Water Division, Pinetree | 0.4 (0.3 to 0.5) | NA in report | 0.3 (0.3 to 0.4) | highest 0.3 |
| Newhall Water Division, Tesoro | 0.4 (0.3 to 0.5) | NA in report | NA in report | NA in report |
| Import Division (groundwater and surface water) | 0.1 (0.1 to 0.2) | 0.2 (0.1 to 0.2) | 0.2 (0.1 to 0.2) | 0.2 (0.1 to 0.3) |
| LA County Waterworks District #36 | below 0.1 | below 0.1 | 0.3 (0.3 to 0.3) | 0.7 (0.6 to 0.7) |
| Water source | 2023 | 2024 | 2025 |
|---|---|---|---|
| SCV Water, groundwater | 0.4 (0.2 to 0.6) | 0.3 (0.2 to 0.7) | 0.4 (0.2 to 0.7) |
| SCV Water, surface water | 0.3 (0.2 to 0.4) | 0.3 (0.3 to 0.3) | 0.3 (0.3 to 0.3) |
| LA County Waterworks District #36 | 0.6 (0.6 to 0.7) | below 0.1 | 0.6 (0.5 to 0.7) |
Across all seven years, the highest single figure was 1.0 mg/L, in the Valencia Water Division’s 2019 range. No average was above 0.7 mg/L.
Fluoride limits and reference levels for drinking water
The State Water Resources Control Board’s fluoride page lists these standards and recommendations.
- California’s legal limit (maximum contaminant level): 2 mg/L
- U.S. EPA’s legal limit: 4 mg/L, and its secondary standard: 2 mg/L
- California’s public health goal, set by OEHHA: 1 mg/L
- U.S. Department of Health and Human Services: 0.7 mg/L
- California’s optimal levels for water systems that fluoridate: 0.7 to 1.2 mg/L, depending on air temperature
- California’s detection limit for reporting: 0.1 mg/L (“below 0.1” in the tables above)
Is Santa Clarita water fluoride safe?
Every figure SCV Water has reported for 2019 to 2025 is below California’s 2 mg/L legal limit. Whether a level is right for a particular person is a question for their own dentist or doctor.
What this data does not show
- The fluoride level at any one home. The reports give ranges and averages across sources, not readings at individual taps.
- Community figures after 2022. Since the 2024 report, fluoride is published by water source, not by division or area.
- Bottled, filtered or private well water, which these reports do not cover.
- Monthly or seasonal changes. Groundwater wells are required to be tested for metals and salts once every three years and surface water every month, so a yearly range can combine samples from different times.
Method and sources
Source: the fluoride row of the water quality table in SCV Water’s Consumer Confidence Reports published 2020 to 2026, each covering the calendar year before. The 2020 to 2023 reports also list an Import Division Perchlorate Treatment Plant column, left out of the tables here; its averages were 0.2 to 0.3 mg/L. Figures are shown as printed; none are averaged or combined. The 2026 report notes that some of its surface water data is from 2024. The 2020 report notes that its Pinetree figures reflect a single source briefly used in that area. The 2021 to 2023 reports (the 2020 report, for Tesoro only) carry a footnote directing readers to the first Import Division column for values left blank under Pinetree and Tesoro; where those reports print NA, this page shows “NA in report.” The descriptions of division service areas and water mix come from the narrative section of the 2023 report (2022 data).
Sources: SCV Water, Consumer Confidence Reports 2020 to 2026, at yourscvwater.com/water-quality (retrieved November 10, 2026). California State Water Resources Control Board, “Fluoride and Fluoridation,” waterboards.ca.gov (page last updated October 27, 2026; retrieved November 10, 2026).
Updated November 2026.
To cite this page: Smile Care Valencia, “Fluoride in Santa Clarita Tap Water, 2019 to 2025,” compiled from SCV Water Consumer Confidence Reports, November 2026, smilecarevalencia.com.