Report Definitions


AL (Regulatory Action Level): Concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.


μS/cm (microsiemens per centimeter): A unit expressing the amount of electrical conductivity of a solution.


MCL (Maximum Contaminant Level): The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. Secondary MCLs (SMCLs) are set to protect the odor, taste and appearance of drinking water.


MCLG (Maximum Contaminant Level Goal): The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the USEPA.


MFL (million fibers per liter): A measure of the presence of asbestos fibers that are longer than 10 micrometers.


MRDL (Maximum Residual Disinfectant Level): The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.


MRDLG (Maximum Residual Disinfectant Level Goal): The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.


NA: Not applicable.


ND (Not detected): The substance was not found by laboratory analysis.


NS: No standard.


NTU (Nephelometric Turbidity Units): Measurement of the clarity/cloudiness—or turbidity—of water. Turbidity in excess of 5 NTU is just noticeable to the average person.


PDWS (Primary Drinking Water Standard): MCLs and MRDLs for contaminants that affect health, along with their monitoring and reporting requirements and water treatment requirements.


PHG (Public Health Goal): The level of a contaminant in drinking water below which there is no known or expected risk to health. PHGs are set by the California EPA.


TT (Treatment Technique): A required process intended to reduce the level of a contaminant in drinking water.


Units We Used for Measurement:


ppm (parts per million): One part substance per million parts water (or milligrams per liter). Imagine one ping-pong ball in an Olympic-sized swimming pool.


ppb (parts per billion): One part substance per billion parts water (or micrograms per liter). Imagine one ping pong ball in 1,000 Olympic-sized swimming pools.


pCi/L (pico curries per liter): A measurement of radioactivity.

Lead and Copper Info

Lead and copper and your drinking water


Federal regulations require Paradise Irrigation District to sample for lead and copper in your drinking water and then the state reviews those samples. Based on the sampling results, there is no reason for concern. The samples show no lead and only minimal results for copper—and those levels are well below the action level of the Health Department.


If you are concerned about lead and/or copper in your water, you may wish to have your water tested. Information on lead and copper in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or a Quick Reference Guide at

PID resources to help you:

Do you have questions about the water you drink and use? You don't have to go to a huge utility company to get the answers you need -- Paradise Irrigation District is a public agency. It is operated to benefit water consumers in our area and governed by local people we've elected.


Unlike privately-owned utility companies, PID makes all of its decision right here in our community.


PID actively seeks citizen input and has a variety of free resources to help you. For more information, call 877-4971.


Monitor your water use and receive leak alerts with AquaHawk alerting

Online bill payment

Monthly newsletters


Water Talk

Annual Water Quality Report

Water testing performed in 2015, or earlier


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icon  Print Version 2016 Water Quality Report


Sampling Results

Paradise Irrigation District has taken thousands of regulated and unregulated water samples during the past years to determine the presence of any radioactive, biological, inorganic, volatile and synthetic organic contaminants and monitor the treatment process. The tables below show only those contaminants that were detected in the water. The State Water Resources Control Board (State Board) requires us to monitor for certain substances less than once per year because the concentrations of these substances do not change significantly. In these cases, the most recent sample data are included, along with the year in which the sample was taken.


Regulated Substances

  Surface Water Supply Groundwater Supply  

(unit of measure)

Year Sampled




Average Detected


Average Detected

Range Low-High


Chlorine (ppm) 2015 No 4 (TT) 4 0.8 0.5-1.3 NA NA Drinking water disinfectant added for treatment.
Fluoride 2015 No 2 1 ND ND <0.1 NA Erosion of natural deposits.
Haloecetic Acids (ppb) 2015 No 60 NA 24 19-33 NA NA Byproduct of drinking water disinfection.
TTHMs (Total Trihalomethanes) (ppb) 2015 No 80 NA 30 27-35 NA NA Byproduct of drinking water disinfection.
Turbidity 1 (NTU) 2015 No (TT) NA 0.04 0.03-0.05 NA NA Soil run-off.
Gross Alpha (pCi/L) 2006/2008 No 15 0 <3.0 NA <3.0 NA Erosion of natural deposits
Radium 228 (pCi/L) 2006/2008 No 5 NA 0.5 NA 0.1 NA Erosion of natural deposits
LEAD & COPPER ANALYSES Tap water samples were collected from sample sites throughout the community (lead was not detected at the 90th percentile).
(Unit of Measure)
Year Sampled Violation? AL PHG
Amount Detected
(90TH %tile)
Sites above
AL/Total Sites
Copper (ppm) 2014 No 1.3 0.3 0.26 0/30      Internal corrosion of household plumbing.
Lead (ppb) 2014 No 15 0.2 0.0 0/30     Internal corrosion of household plumbing.

Secondary Substances

  Surface Water Supply Groundwater Supply  
(Unit of Measure)
Violation? SMCL PHG (MCLG) Average
Chloride (ppm) 2011 No 500 NS 3 NA 1.3 NA Run-off/leaching from natural deposits; seawater influence
Sulfate (ppm) 2014 No 500 NS 2 NA <2 NA Run-off/leaching from natural deposits; industrial wastes.
Total Dissolved Solids (ppm) 2011 No 1,000 NS 40 NA 142 NA Run-off/leaching from natural deposits.
Zinc (ppm) 2014 No 5 NS 0.3 NA ND NA Run-off/leaching from natural deposits; industrial wastes.


Unregulated and Other Substances

  Surface Water Supply Groundwater Supply  
(Unit of Measure)
Boron (ppb) 2002 NA NA 156 100-213 Run-off/leaching from natural deposits; seawater influence.
Chromium 6 (ppb) 2015 .13 NA 3.4 NA Naturally-occurring organic materials.
Sodium (ppb) 2014 1.9 NA 5.1 NA Run-off/leaching from natural deposits.
Hardness (ppb) 2014 28 NA 76 NA Substances which form ions when in water; seawater influence.

1 Turbidity is a measure of water’s cloudiness. Indicator of our filtration system’s effectiveness (treatment technique)

Learn about our community’s great water quality!

We’re proud to present our annual water quality report covering all testing performed between Jan. 1 and Dec. 31, 2015, or earlier.


At Paradise Irrigation District we’re committed to delivering the best-quality drinking water possible. We remain vigilant in meeting the challenges of new regulations, water source protection, water conservation and community outreach and education while continuing to serve the needs of our water users.


Thank you for allowing us to continue providing you and your family with high quality drinking water.


Please share your thoughts with us on the information in this report. And, if you have any questions or concerns, we’re here to help. Call George Barber at 530/877-4971.

Source of Supply



Customers of the Paradise Irrigation District are fortunate because we enjoy a high-quality water supply from the upper portion of the  Little Butte Creek Watershed (about 7,400 acres). Water which falls within this watershed (mostly via rain, though a little from snow) flows into either Paradise Lake and/or Magalia Reservoir. These two reservoirs are owned and operated by the District for the purpose of storing water for the residents of the District.


The PID treatment plant draws water primarily from Paradise Lake throughout the year, and secondarily from Magalia Reservoir for short periods in the fall and winter; together they hold a total of 12,293 acre-feet of water. Runoff is collected over 11.2 square miles of watershed located north and east of Magalia Reservoir. This watershed is heavily forested and sparsely populated, which contributes to the high-quality water we serve. The water treatment plant was constructed in 1995. The plant provides average flows in the winter and summer of 3 million gallons per day (MGD) and 7 MGD, respectively.


The District drilled and developed a ground water source at the D Tank site. This well produces up to 450 gallons per minute (gpm) and is used as a drought management and emergency source (e.g., large pipeline break). This source was used 8 days in August 2015 and pumped 4.8 million gallons of water. Water quality testing has been done to qualify it as an approved source.

Source Water Assessment

Source Water Assessment available at office


streamPID’s 2011 Source Water Assessment Plan is available at our office for your review. This plan is an assessment of the area of influence around our listed “raw” water sources through which contaminants, if present, could migrate and reach our source water. It also includes an inventory of potential sources of contamination within the area and a determination of the water supply’s susceptibility to contamination by the identified potential sources.


Ground Water Supply (Well at D Tank): High-density septic systems and automobile repair shops.


Surface Water Supply (Little Butte Creek Watershed): High-density septic systems and historic mining operations.


A copy of the complete assessment may also be viewed at California Department of Public Health (CDPH) Valley District Office, 364 Knollcrest Drive, Suite 101, Redding, CA 96002, Attention: Reese Crenshaw, (530) 224-4861, or Paradise Irrigation District Office, 6332 Clark Road, Paradise, CA 95969, Attention: George Barber, (530) 877-4971.

Substances that could be in drinking water…

The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and, in some cases, radio-active material, and can pick up substances resulting from the presence of plants,  animals or from human activity.


To make sure our tap water is safe to drink, the U.S. Environmental Protection Agency (US EPA) and the State Water Resources Control Board (State Board) prescribe regulations limiting the amount of certain contaminants in water provided by public water systems. State Board regulations also establish limits for contaminants in bottled water that must provide the same protection for public health. Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk.


faucetContaminants that may be present in source water include:


Microbial Contaminants, such as viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife;


Inorganic Contaminants, such as salts and metals, that can be naturally occurring or can result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming;


Pesticides and Herbicides, that may come from a variety of sources, such as agriculture, urban stormwater runoff, and residential uses;


Organic Chemical Contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production and which can also come from gas stations, urban stormwater runoff, agricultural applications, and septic systems;


Radioactive Contaminants, that can be naturally occurring or can be the result of oil and gas production and mining activities.


More information about contaminants and potential health effects can be obtained by calling the U.S. EPA’s Safe Drinking Water Hotline at (800) 426-4791.

Health information for medically-vulnerable residents of our community

Some people may be more vulnerable to contaminants in drinking water than the general popu-lation. Immunocompromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants may be particularly at risk from infections. These people should seek advice about drinking water from their health care providers.


The US EPA/CDC (Centers for Disease Control and Prevention) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline at (800) 426-4791 or