Serving roughly 666,581 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 EASTERN MUNICIPAL WD
1 water provider directly on file, serving roughly 666,581 people in Riverside County, California.
Quick answer: EASTERN MUNICIPAL WD has no violations on file. One reading is worth knowing about: Carbon, Total was measured at 1.41MG/L, 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
Lithium
Aggressive Index
Langelier Index (pH(s))
Magnesium
Calcium
Potassium
Silica
Sodium
Hardness, Total (ASCACO3)
Alkalinity, Total
Alkalinity, Bicarbonate
Carbon, Total
TDS
Chloride
Sulfate
Fluoride
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorohexanesulfonicacid (PFHxS)
Perfluorononanoicacid (PFNA)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorodecanoicacid (PFDA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Turbidity
pH, Field
Odor
Boron, Total
Lead
Iron
Utility EASTERN MUNICIPAL WDPopulation served 666,581Owner Local government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0028 mg/L (ppm)
12/31/2025
Lead
Detected: 0.1 UG/L (ppb)
7/2/2025
A metal that can leach from old pipes, solder, and fixtures. Current medical guidance holds there is no truly safe level of lead exposure, especially for children and pregnant women.
Iron
Detected: 18 UG/L (ppb)
9/2/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 680 MG/L (ppm)
9/24/2025
Sulfate
Detected: 10.5 MG/L (ppm)
7/8/2025
Fluoride
Detected: 0.19 MG/L (ppm)
7/8/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 1.12 MG/L (ppm)
7/7/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Boron, Total
Detected: 42 UG/L (ppb)
7/7/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 2.22 MG/L (ppm)
7/8/2025
Calcium
Detected: 33.2 MG/L (ppm)
7/8/2025
Potassium
Detected: 2.4 MG/L (ppm)
7/8/2025
Sodium
Detected: 27.6 MG/L (ppm)
7/8/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.19 LANG
7/8/2025
Hardness, Total (ASCACO3)
Detected: 92.1 MG/L (ppm)
7/8/2025
pH, Field
Detected: 7.95 PH
7/8/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 32 µg/L (ppb)
5/8/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 155 MG/L (ppm)
7/8/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 12 AGGR
7/8/2025
Silica
Detected: 19.5 MG/L (ppm)
7/8/2025
Alkalinity, Total
Detected: 127 MG/L (ppm)
7/8/2025
Carbon, Total
Detected: 1.41 MG/L (ppm)
7/7/2025
TDS
Detected: 2600 MG/L (ppm)
9/24/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 3.2 NG/L (ppt)
10/1/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 2.7 NG/L (ppt)
10/1/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 5.3 NG/L (ppt)
10/1/2025
Perfluorononanoicacid (PFNA)
Detected: 2.4 NG/L (ppt)
7/2/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 8.4 NG/L (ppt)
10/1/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 7.5 NG/L (ppt)
10/1/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorodecanoicacid (PFDA)
Detected: 1.8 NG/L (ppt)
3/26/2025
Perfluorohexanoicacid (PFHXA)
Detected: 5.7 NG/L (ppt)
10/1/2025
Perfluorobutanoicacid (PFBA)
Detected: 2.8 NG/L (ppt)
10/1/2025
Perfluoropentanoicacid (PFPEA)
Detected: 5.3 NG/L (ppt)
10/1/2025
Turbidity
Detected: 0.21 NTU
7/8/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1 TON
9/2/2025
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.