theRidge.png Great water quality is just one of the benefits of living on the ridge. If you're new to Paradise, visit the WelcometoTheRidge website to learn about all the other great things happening in our community.

 

  

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Source Water Assessment

PID’s 2021 Source Water Assessment Plan is available at our office for your review. This is an assessment of the area of influence around our listed “raw” water sources through which contaminants, if present, could 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.

The Source Water Assessment is also available at the State Water Resources Control Board Division of Drinking Water (Redding office): 364 Knollcrest Dr., Suite 101; Redding, CA 96002; (530) 224-4800

 

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Your Water. Clean. Fresh. Pure.

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 throughout the year when needed; together they hold a total of 12,293 acre-feet of water. Runoff is collected over 11.8 square miles of watershed located primarily north of Paradise Lake and Magalia Reservoir. This watershed is heavily forested and sparsely populated, which contributes to the high-quality water we serve. PID's water treatment plant provides average flows in the winter and summer of 3 million gallons per day (MGD) and 8 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. Water quality testing has been done to qualify it as an approved source.

 

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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; some that were not detected are listed because our customers may be interested in seeing the results. 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.

 

pdf Download Report (838 KB)

PRIMARY HEALTH STANDARDS

 Surface Water Supply Groundwater Supply  

SUBSTANCE
(UNIT OF MEASURE)

MCL

YEAR

SAMPLED

AVERAGE
DETECTED

RANGE
LOW-HIGH

YEAR
SAMPLED

AVERAGE
DETECTED

RANGE
LOW-HIGH

MAJOR SOURCE IN DRINKING WATER
INORGANIC
Chromium (Total)
(ppb)		 50 2020 ND ND 2014 3.4 3.4 Erosion of natural deposits.
Hexavalent Chromium
(ppb)		 ~ 2015 ND ND 2017 2.5 2.5 Erosion of natural deposits.
CLARITY
Turbidity (NTU)
(prior to treatment)		 ~ 2022 0.92 .34-3.37 2016 0.18 0.18 Soil runoff.
Turbidity (NTU) (TT)
(treated water)		 0.2 2022 0.05 0.02-0.23 NA NA NA Soil runoff.

 

Turbidity is a measurement of the cloudiness of the water. Turbidity measurement is a good indicator of the effectiveness of the filtration system. PID’s permit with State Drinking Division requires PID to deliver water with no more than 0.2 NTU.

 
RADIOLOGICAL
Radium 228 (pCi/L) 5 2017 2.2 2.2 2017 2.93 2.93 Erosion of natural deposits.
DISINFECTANT
Chlorine, Free Residual as Cl2
(ppm) (TT)		 4 2022 0.89 0.24 - 1.49 NA NA NA Water additive used to control microbes.
DISINFECTANT BY-PRODUCTS
Trihalomethanes, Total (ppb) 80 2022 33 23-41 NA NA NA Drinking water disinfection.
Haloacetic Acids, Total (ppb) 60 2022 39 34-52 NA NA NA Drinking water disinfection.
DISINFECTANT BY-PRODUCT PRECURSOR
Total Organic Carbon
(prior to treatment)		 ~ 2022 1.2 0.7-1.5 NA NA NA Decay of natural organic matter.

 

UNREGULATED AND OTHER SUBSTANCES

 Surface Water Supply Groundwater Supply  

CHEMICAL
(UNIT OF MEASURE)

YEAR SAMPLED

AVERAGE DETECTED

RANGE 
LOW-HIGH

YEAR SAMPLED

AVERAGE DETECTED

RANGE 
LOW-HIGH

MAJOR SOURCE IN DRINKING WATER
Alkalinity as CaC03 (ppm) 2020 30 30 2014 81 81 Natural occurring substance.
Bicarbonate Alkalinity (ppm) 2020 40 40 2014 99 99 Natural occurring substance.
Calcium (ppm) 2020 6 6 2014 15 15 Natural occurring substance.
Magnesium (ppm) 2020 4 4 2014 9.3 9.3 Natural occurring substance.
Sodium (ppm) 2020 3 3 2014 5.1 5.1 Natural occurring substance.
Chlorate (ppb) 2015 260 120-400 NA NA NA Sodium Hypochlorite used for disinfection.
pH 2022 7.2 7.1-7.3 2017 7.3 7.3 Slightly basic water.

  

SECONDARY AESTHETIC STANDARDS

 Surface Water Supply Groundwater Supply  

CHEMICAL (UNIT OF MEASURE)

MCL

YEAR SAMPLED

AVERAGE DETECTED

RANGE
LOW-HIGH

YEAR SAMPLED

AVERAGE DETECTED

RANGE
LOW-HIGH

MAJOR SOURCE IN DRINKING WATER
Chloride (ppm) 500 2020 2 2 2014 1.3 1.3 Natural occurring substance.
Hardness (ppm) ~ 2020 31.4 31.4 2014 76 76 Naturally occurring substance.
Sulfate (ppm) 250 2020 1.4 1.4 NA NA NA Naturally occurring substance.
Total Dissolved Solids (ppm) 500 2020 70 70 2014 150 150 Naturally occurring substance.
CORROSIVITY
Specific Conductance (uS/cm) 1600 2020 89 89 2014 160 160 A measurement of water's conductance.
Langelier Saturation Index * Non-Corrosive 2020 -2.2 -2.2 NA NA NA Indicator of corrosiveness of water.
Aggressive Index Non-Corrosive 2020 9.6 9.6 NA NA NA Indicator of corrosiveness in water.
Zinc (ppm)(TT) 5 2020 0.47 0.47 2014 NA NA Water additive used to control corrosion.
Orthophosphate (ppm) (TT) ~ 2017 0.92-1.41 1.11 NA NA NA Water additive used to control corrosion.

 

* The Langelier Saturation and Aggressive Indices and Specific Conductance are tests to measure the corrosivity of water. The results indicate that PID water is mildly corrosive. Zinc orthophosphate (ZOP) is added at the treatment plant to reduce the corrosiveness of the water on metallic pipes.

 Flouride is not added to the District's drinking water; fluoride concentration in the raw water is not detectable.

LEAD AND COPPER ANALYSIS

 Every three years PID is required to sample at the customers’ faucets for lead and copper. This monitoring ensures our water is not too corrosive and does not leach unsafe levels of these metals into your drinking water. Compliance measurements are from the 90th percentile (the level measured at 90% of homes sampled). See “Corrosivity” section.

 
SUBSTANCE (UNIT OF MEASURE)   YEAR      SAMPLED  VIOLATION?  AL  PHG  (MCLG) AMOUNT
DETECTED (90th%TILE)		 SITES ABOVE AL/TOTAL SITES TYPICAL SOURCE
Copper (ppm at the 90th percentile) 2020 No 1.3 0.3 0.08 0/10 Internal corrosion of household plumbing.
Lead (ppb at the 90th percentile) 2020 No 15 0.2 ND 0/10 Internal corrosion of household plumbing.


 TOTAL COLIFORM AND E.COLI SAMPLING IN 2020

MICROBIOLOGICAL
CONTAMINANTS
(AND REPORTING UNITS)

HIGHEST
NUMBER
DETECTED

 # MONTHS IN
VIOLATION		 MCL IN
COMPLIANCE?		 MAJOR SOURCE IN DRINKING WATER
 Total Coliform 0 0 1 sample Yes Naturally present in environment.
Fecal Coliform or E.coli
(State Total Coliform rule)		 0 0 A routine sample and a repeat sample are total coliform positive, and one of these is also fecal coliform or E.coli positive. Yes

Human and animal fecal waste.
Fecal Coliform or E.coli
(Federal Revised Total Coliform rule)		 0 0 Routine and repeat samples are total coliform-positive and either is E.coli or system fails to take repeat samples following E.coli positive routine sample or system fails to analyze total coliform-positive repeat sample for E.coli Yes human and animal fecal waste.



This Consumer Confidence Report (CCR) reflects changes in drinking water regulatory requirements during 2019. All water systems are required to comply with the state Total Coliform Rule. Beginning April 1, 2016, all water systems were also required to comply with the federal Revised Total Coliform Rule. The new federal rule maintains the purpose to protect public health by ensuring the integrity of the drinking water distribution system and monitoring for the presence of microbials (e.g., total coliform and E. coli bacteria). The U.S. EPA anticipates greater public health protection as the new rule requires water systems that are vulnerable to microbial contamination to identify and fix problems. Water systems that exceed a specified frequency of total coliform occurrences are required to conduct an assessment to determine if any sanitary defects exist. If found, these must be corrected by the water system.

 

 

 

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