Local resources
Glendale Hard Water
How Hard Is Glendale Water?
Glendale’s tap water is hard, but how hard depends on which supply reaches your home. Glendale Water & Power’s most recent water quality report doesn’t publish a citywide average. Instead, it lists hardness by source: about 140 ppm for MWD Jensen water, 234 ppm for MWD Weymouth water (range 189–280), and 350 ppm for local groundwater treated at the Glendale Water Treatment Plant, or roughly 8 to 20 grains per gallon. According to the latest report, about 63% of Glendale’s water was imported from the Metropolitan Water District and 31% was local groundwater.
Where Can I Get A Water Quality Report?
You can access Glendale’s annual Water Quality Report. This is also known as a consumer confidence report, and provides detailed data on the composition of your municipal water annually.
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Frequently Asked Questions
Is Glendale tap water safe to drink?
Glendale Water & Power ran more than 80,000 tests for its most recent water quality report, but that report still lists contaminants like chromium VI (2.9–8.7 ppb in local groundwater before blending), nitrate (4.3–5.4 ppm as nitrogen in local groundwater), and low levels of arsenic. Chromium VI is below California’s 10 ppb MCL and nitrate is below the 10 ppm limit. Results can also vary by home: in the most recent lead and copper tap sampling, 3 of 51 sites were above the copper action level, though the system as a whole remained in compliance. Home filtration systems, like reverse osmosis, can reduce these contaminants.
Is Glendale’s water hard?
Yes. Glendale’s water is hard to very hard depending on the source: about 140 ppm for MWD Jensen water, 234 ppm for MWD Weymouth water, and 350 ppm for local groundwater, or roughly 8–20 gpg. This can cause limescale, dry skin, and reduced appliance efficiency.
Does Glendale’s water contain PFAS (“Forever Chemicals”)?
PFAS has been found in some of Glendale’s local groundwater. According to Glendale Water & Power’s most recent water quality report, the Glendale Water Treatment Plant has used a proven PFAS removal technology on affected San Fernando Basin wells since as early as 2000, and GWP took its Verdugo Basin wells offline in 2024 after PFAS was detected using a more sensitive testing method. The report doesn’t list PFOA, PFOS, or PFHxS levels for the water delivered to homes, so a free in-home water test is the best way to check your tap.
Does Glendale add fluoride to its water?
Not to its own groundwater, which contains naturally occurring fluoride. The imported Metropolitan Water District water that makes up most of Glendale’s supply is fluoridated at MWD’s treatment plants. Glendale’s tap water averaged 0.67 ppm fluoride in the most recent water quality report (range 0.47–0.77), within state and federal guidelines.
What other contaminants are in Glendale’s water?
The most recent report identified several other contaminants, including:
- Chromium VI (2.9–8.7 ppb in local groundwater)
- Nitrate (4.3–5.4 ppm as nitrogen in local groundwater; not detected in MWD water)
- Arsenic (low levels; the report doesn’t publish a figure)
- TDS (about 292–607 ppm, depending on the source)
- Uranium (2 pCi/L in MWD Jensen water, range 2–3; up to 3 pCi/L in MWD Weymouth water)
Where does Glendale get its water?
According to the most recent water quality report, 63.3% of Glendale’s water was imported, 31.3% came from local groundwater, and 5.4% was recycled water used only for irrigation and other non-drinking purposes. Imported water is sourced from the Metropolitan Water District, while local groundwater comes from the San Fernando Basin and is treated at the Glendale Water Treatment Plant.
What is the pH level of Glendale water?
Glendale’s water pH ranges from 8.1 to 8.4, depending on the source (about 8.3 on average in the most recent water quality report), which is slightly alkaline.
Should I use a water filter or softener in Glendale?
Yes. Due to hardness that varies by source and contaminants like chromium VI and nitrate in local groundwater, whole-house water filtration systems paired with water softeners are recommended for many households.
Does Glendale water have high total dissolved solids (TDS)?
It depends on the source. Glendale Water & Power’s most recent water quality report doesn’t publish a citywide TDS figure; it lists about 292 ppm for MWD Jensen water, 506 ppm for MWD Weymouth water (range 346–660), and 607 ppm for local groundwater (range 550–650). The Weymouth and groundwater levels are above California’s 500 ppm recommended secondary standard but below the 1,000 ppm upper limit, and higher TDS can affect taste. Reverse osmosis systems are effective for reducing TDS.
Where Can I Get A Local Tap Water Quality Report?
You can access the most recent Glendale’s Tap Water Quality Report here.
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