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.

 

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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)	~	2021	0.66	.31-2.81	2016	0.18	0.18	Soil runoff.
Turbidity (NTU) (TT) (treated water)	0.2	2021	0.04	0.02-0.09	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	2021	0.80	0 - 1.41	NA	NA	NA	Water additive used to control microbes.
DISINFECTANT BY-PRODUCTS
Trihalomethanes, Total (ppb)	80	2021	35	24-52	NA	NA	NA	Drinking water disinfection.
Haloacetic Acids, Total (ppb)	60	2021	50	26-83	NA	NA	NA	Drinking water disinfection.
DISINFECTANT BY-PRODUCT PRECURSOR
Total Organic Carbon (prior to treatment)	~	2021	1.7	1.4-1.8	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	2021	7.2	7-7.4	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.