Rolling Hills Estates Water Company water quality

Bar length is the highest result in the last 36 months as a share of the federal limit (MCL, or action level for lead and copper). The dark tick marks the limit. Gross alpha is compared after subtracting uranium, as DEQ does for compliance.

Aesthetic and unregulated

Taste, odor, staining or scale, not health limits. Bars use the EPA secondary standard where one exists.

• Gross Alpha: Compliance uses the running average of gross alpha minus uranium. Shown value is the highest lab result; the adjusted average is 6.04 pCi/L after subtracting 4.36 pCi/L for uranium.

ppb = parts per billion (µg/L), ppm = parts per million (mg/L), ppt = parts per trillion. ND = not detected above the lab's reporting limit. MCL = federal maximum contaminant level; AL = action level for lead and copper (90th percentile of home taps); aesthetic = secondary standard for taste, odor or staining, not health. Bars show the highest result in 36 months as a share of the limit.

✓ no violation recorded n monitoring or reporting only n includes a health-based violation ? outside the loaded record

No health-based violations (MCL, treatment technique, or disinfectant level) in the last ten years.

No lead and copper tap sampling summary in the window we reviewed.

2 active wells, and 1 treatment point on record (SDWIS counts each chlorination or filtration point as a treatment plant).

WELL #1: Susceptibility: ioc moderate, voc moderate, soc moderate, microbial high (auto).

Source water assessment susceptibility: final map[IOC:Moderate Microbials:Auto High SOC:Moderate VOC:Moderate]; hydrologic sensitivity M; pci land use map[IOC:H Microbials:M SOC:M VOC:M]; system construction M;

We may earn a commission if you buy through these links. Rankings come from the matching engine (certification + flagged contaminants + annual cost), not from who pays more. How we earn money. As an Amazon Associate we earn from qualifying purchases. Prices are not shown; Amazon sets them on its site.