Serving roughly 74,807 people in Riverside County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for DESERT WATER AGENCY
1 water provider directly on file, serving roughly 74,807 people in Riverside County, California.
Quick answer: DESERT WATER AGENCY has no violations on file. One reading is worth knowing about: Aggressive Index was measured at 12.4AGGR, among the highest of the 451 providers on file in this area. It's the most notable figure in this system's record among its 451 local peers.
Lead Summary
Aggressive Index
Temperature (CENTIGRADE)
Langelier Index (Source Temp.)
Magnesium
Potassium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Sulfate
Chloride
Fluoride
Nitrate
Turbidity
pH
Iron
Chromium, Hex
Perchlorate
Chromium
Barium
Selenium
Aluminum
Conductivity (at 25°C)
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dibromoaceticacid
Dichloroaceticacid
Trichloroaceticacid
Utility DESERT WATER AGENCYPopulation served 74,807Owner Local government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Iron
Detected: 86 UG/L (ppb)
5/22/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Chromium, Hex
Detected: 1.9 UG/L (ppb)
7/17/2025
Chromium
Detected: 2 UG/L (ppb)
7/17/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Barium
Detected: 72 UG/L (ppb)
7/17/2025
Selenium
Detected: 5 UG/L (ppb)
5/22/2025
Aluminum
Detected: 90 UG/L (ppb)
7/17/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 16 UG/L (ppb)
6/12/2025
TTHM
Detected: 14 UG/L (ppb)
6/12/2025
A group of disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure above the legal limit has been linked to increased cancer risk in some studies.
Chloroform
Detected: 1.3 UG/L (ppb)
6/12/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 3.6 UG/L (ppb)
6/12/2025
Bromodichloromethane
Detected: 3.7 UG/L (ppb)
6/12/2025
Dibromochloromethane
Detected: 5.4 UG/L (ppb)
6/12/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 200 MG/L (ppm)
7/17/2025
Chloride
Detected: 90 MG/L (ppm)
7/17/2025
Fluoride
Detected: 0.41 MG/L (ppm)
7/17/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 0.31 MG/L (ppm)
7/17/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 15 MG/L (ppm)
7/17/2025
Potassium
Detected: 6.8 MG/L (ppm)
7/17/2025
Sodium
Detected: 79 MG/L (ppm)
7/17/2025
Calcium
Detected: 90 MG/L (ppm)
7/17/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 290 MG/L (ppm)
7/17/2025
pH
Detected: 8 PH
7/17/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 120 MG/L (ppm)
7/17/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 12.4 AGGR
7/17/2025
Temperature (CENTIGRADE)
Detected: 25 C
7/17/2025
Langelier Index (Source Temp.)
Detected: 0.63 LANG
7/17/2025
Alkalinity, Total
Detected: 120 MG/L (ppm)
7/17/2025
TDS
Detected: 580 MG/L (ppm)
7/17/2025
Turbidity
Detected: 0.48 NTU
5/22/2025
A measure of water cloudiness from suspended particles.
Perchlorate
Detected: 1.1 UG/L (ppb)
6/17/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Conductivity (at 25°C)
Detected: 890 UMHO/CM
7/17/2025
Dibromoaceticacid
Detected: 1.6 UG/L (ppb)
6/12/2025
Dichloroaceticacid
Detected: 7.3 UG/L (ppb)
6/12/2025
Trichloroaceticacid
Detected: 8.3 UG/L (ppb)
6/12/2025
Filtration considerations: See the table below for how whole-house carbon, under-sink reverse osmosis, and under-sink carbon systems compare against what's actually on file here. These are general system types, not a specific product recommendation.