
Los Angeles County, California | Municipal Water Utility Company | Public Service Announcement
Local tap water provided by Sunny Slope Water Company may contain several concerning contaminants including N-Nitrosodi-N-propylamine, Beryllium, Nitrates/Nitrites and Diisobutyl phthalate, and residents might experience issues related to excessive water hardness. The company supplies Los Angeles County with water sourced exclusively from local Groundwater reservoirs.
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Sunny Slope Water Company Area Details

Area served:
Los Angeles County, California

Population served:
32691

Water source:
Groundwater

Phone:
626-287-5238

Address:
1040 El Campo Dr., Pasadena , CA 91107

3date
Contaminants Detected In Los Angeles County, California
1,2,3-Trichloropropane; Chromium (hexavalent); Tetrachloroethylene (perchloroethylene); Total trihalomethanes (TTHMs); Bromodichloromethane; Trichloro… more

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Sunny Slope Water Company
Annual Municipal Water Report
List of Municipal Water Contaminants Tested by Sunny Slope Water Company
Tested But Not Detected:
1,1,1,2-Tetrachloroethane; 1,1,1-Trichloroethane; 1,1,2,2-Tetrachloroethane; 1,1,2-Trichloroethane; 1,1-Dichloroethane; 1,1-Dichloroethylene; 1,1-Dichloropropene; 1,2,3-Trichlorobenzene; 1,2,4-Trichlorobenzene; 1,2,4-Trimethylbenzene; 1,2-Dichloroethane; 1,2-Dichloropropane; 1,3,5-Trimethylbenzene; 1,3-Butadiene; 1,3-Dichloropropane; 1,3-Dichloropropene; 1,4-Dioxane; 2,2-Dichloropropane; 2-Chloroethylvinyl ether; Aluminum; Antimony; Arsenic; Barium; Benzene; Beryllium; Bromobenzene; Bromochloromethane; Bromomethane; Cadmium; Chlorodifluoromethane; Chloroethane; Chloroform; Chloromethane; cis-1,2-Dichloroethylene; cis-1,3-Dichloropropene; Cobalt; Cyanide; Di(2-ethylhexyl) phthalate; Dibromoacetic acid; Dibromomethane; Dichloroacetic acid; Dichlorodifluoromethane; Dichloromethane (methylene chloride); Ethyl tert-butyl ether; Ethylbenzene; Haloacetic acids (HAA5); Hexachlorobutadiene; Isopropyl ether; Isopropylbenzene; m- & p-Xylene; m-Dichlorobenzene; Manganese; Mercury (inorganic); Methyl ethyl ketone; Methyl isobutyl ketone; Monobromoacetic acid; Monochloroacetic acid; Monochlorobenzene (chlorobenzene); MTBE; n-Butylbenzene; n-Propylbenzene; Naphthalene; Nitrite; o-Chlorotoluene; o-Dichlorobenzene; o-Xylene; p-Chlorotoluene; p-Dichlorobenzene; p-Isopropyltoluene; Perchlorate; Perfluorobutane sulfonate (PFBS); Perfluoroheptanoic acid (PFHPA); Perfluorohexane sulfonate (PFHXS); Perfluorononanoic acid (PFNA); Perfluorooctane sulfonate (PFOS); Perfluorooctanoic acid (PFOA); sec-Butylbenzene; Selenium; Silver; Styrene; tert-Amyl methyl ether; tert-Butylbenzene; Thallium; Thiobencarb; Toluene; trans-1,2-Dichloroethylene; trans-1,3-Dichloropropene; Trichloroacetic acid; Trichlorofluoromethane; Trichlorotrifluoroethane; Vinyl chloride; Xylenes (total)

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Sunny Slope Water Company
About Us
WATER OVERVIEW
Underground water reserves are replenished when rainfall seeps into the soil. Water flowing across land or filtering through earth naturally dissolves minerals and may collect substances from animal activity or human sources. While natural filtration removes many contaminants, some pollutants can still persist.
Potential water contaminants include:
- Inorganic contaminants: Salts and metals occurring naturally or from urban runoff, wastewater discharge, oil/gas production, mining, or agricultural operations.
- Microbial contaminants: Viruses and bacteria potentially from sewage treatment facilities, septic systems, livestock operations, or wildlife.
- Nitrates and Nitrites: From natural nitrogen breakdown in soil or from fertilizer runoff, improper waste disposal, leaking septic systems, or agricultural operations.
- Organic chemical contaminants: Synthetic and volatile organic compounds from industrial processes, petroleum production, gas stations, runoff, or septic systems.
- Pesticides and herbicides: From agricultural applications, urban runoff, and residential usage.
- Radioactive contaminants: Naturally occurring or resulting from oil/gas production or mining activities.
All tap water, including bottled water, reasonably contains small amounts of some contaminants. Their presence doesn't necessarily indicate a health risk. Your water undergoes regular testing using SWRCB-approved methods to ensure safety. This report's table lists all constituents detected in your water that have federal and state standards, along with unregulated constituents of interest.

For more information on your municipal water, visit the U.S. Environmental Protection Agency:
Sunny Slope Water Company Municipal Water Company and EPASunny Slope Water Company Municipal Water Report Info
HISTORICAL BACKGROUND
The first water development on land currently served by Sunny Slope Water Company occurred around 1821, when San Gabriel Mission Padres constructed a stone dam on what is now La Presa Drive, just north of Huntington Drive. Water traveled to the Mission through adobe flumes to irrigate vineyards and power the winery and flour mill operations.
In May 1839, Hugo Reid petitioned the Mexican Republic for the Rancho Santa Anita land grant, which was officially awarded by Governor Juan B. Alvarado in April 1841. During his ownership, Reid resided on the property and established vineyards using water from the stone dam.
Henry Dalton purchased the approximately 13,500-acre Rancho Santa Anita from Reid in 1847. A decade later, Dalton transferred the property to Joseph A. Rowe, who subsequently sold it to William H. Corbitt and Albert Dibblee. In 1861, the partners sold a 2,200-acre western portion to Leonard J. Rose, marking the first division of the ranch. Rose named his property "Sunny Slope Farm."
The farm utilized water from artesian wells, and by 1895, twenty-two wells produced approximately 2,200 acre-feet annually—in the same area where current Sunny Slope Water Company wells operate today.
In 1887, L.J. Rose and Company, Ltd., a British corporation, purchased Sunny Slope from Rose for $1,035,000. The owners began subdividing the farm and developing a water system. In 1895, they established the Sunny Slope Water Company to manage their system and provide water to other farmers. The deed granted Sunny Slope exclusive rights to develop water on a specific 160-acre tract where the company's wells were located, with an agreement to deliver water to shareholders proportionate to their ownership stake.
Municipal Water Utility Company FAQ

For more information on your municipal water, visit the U.S. CDC:
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Sunny Slope Water Company delivers municipal water services to residents of Pasadena and Los Angeles County, California.
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