RIVERSTONE/ROOTCREEK WATER DISTRICT Water Quality Report
Serving roughly 5,507 people in Madera County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for RIVERSTONE/ROOTCREEK WATER DISTRICT
1 water provider directly on file, serving roughly 5,507 people in Madera County, California.
Quick answer: RIVERSTONE/ROOTCREEK WATER DISTRICT currently has an open health-based violation on file: Lead And Copper Rule Revisions, a compliance issue since 10/17/2024. This is active, not historical — see the violation detail below for what EPA's enforcement record shows.
Lead Summary
TTHM
Dibromoaceticacid
Bromoform
Dibromochloromethane
Orthophosphate
Turbidity
Color
Magnesium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Fluoride
Nitrate
Nitrite
pH
Odor
Iron
Manganese
Chromium, Hex
Mercury
Chromium
Nickel
Barium
Arsenic
Selenium
Aluminum
Conductivity (at 25°C)
Potassium
Gross Alpha Particle Activity
Antimony, Total
Utility RIVERSTONE/ROOTCREEK WATER DISTRICTPopulation served 5,507Owner Private
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Iron
Detected: 60 UG/L (ppb)
9/5/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 210 UG/L (ppb)
9/5/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 0.032 UG/L (ppb)
8/18/2025
Mercury
Detected: 0.57 UG/L (ppb)
5/5/2025
Chromium
Detected: 1.4 UG/L (ppb)
8/18/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Nickel
Detected: 1.2 UG/L (ppb)
8/18/2025
Barium
Detected: 29 UG/L (ppb)
8/18/2025
Arsenic
Detected: 3.9 UG/L (ppb)
9/16/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Selenium
Detected: 2.7 UG/L (ppb)
4/3/2025
Aluminum
Detected: 12 UG/L (ppb)
8/18/2025
Antimony, Total
Detected: 2.2 UG/L (ppb)
8/18/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 3 UG/L (ppb)
8/11/2025
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.
Bromoform
Detected: 2 UG/L (ppb)
8/11/2025
Dibromochloromethane
Detected: 1 UG/L (ppb)
8/11/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 18 MG/L (ppm)
8/18/2025
Sulfate
Detected: 3.8 MG/L (ppm)
8/18/2025
Fluoride
Detected: 0.2 MG/L (ppm)
5/5/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 1.2 MG/L (ppm)
8/18/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrite
Detected: 0.01 MG/L (ppm)
5/19/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 21 MG/L (ppm)
9/5/2025
Sodium
Detected: 39 MG/L (ppm)
8/18/2025
Calcium
Detected: 86 MG/L (ppm)
9/5/2025
Potassium
Detected: 2.5 MG/L (ppm)
8/18/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Orthophosphate
Detected: 0.19 MG/L (ppm)
9/5/2025
Hardness, Total (ASCACO3)
Detected: 300 MG/L (ppm)
9/5/2025
pH
Detected: 7.6 PH
9/5/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
Gross Alpha Particle Activity
Detected: 2.99 PCI/L
8/18/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 120 MG/L (ppm)
8/18/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 1 UG/L (ppb)
8/11/2025
Turbidity
Detected: 2.2 NTU
8/18/2025
A measure of water cloudiness from suspended particles.
Color
Detected: 10 UNITS
8/18/2025
Alkalinity, Total
Detected: 120 MG/L (ppm)
8/18/2025
TDS
Detected: 190 MG/L (ppm)
8/18/2025
Odor
Detected: 1 TON
8/18/2025
Conductivity (at 25°C)
Detected: 280 UMHO/CM
8/18/2025
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.