Drinking water quality · 2022
· Verified
What's in City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA tap water
18 contaminants were measured in the City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA water system's 2022 annual report. Each is shown below against its federal limit.
- Reporting year
- 2022
- Contaminants measured
- 18
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
state-level CCR
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 45.5 ug/LAverageLopez WTP | None set | Within the limit |
+By source (2)— Lopez WTP, Groundwater
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 57.9 ug/LAverageGroundwater | None set | Within the limit |
+By source (2)— Lopez WTP, Groundwater
| |||
| Chlorite | 0.71 mg/LAverageLopez WTP | 1 mg/LMCL | Within the limit |
+By source (2)— Lopez WTP, Groundwater
| |||
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 2.87 mg/LAverageState Water | None set | Within the limit |
+By source (2)— Lopez WTP, Groundwater
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 4.8 mg/LAverageGroundwater | 10 mg/LMCL | Within the limit |
+By source (2)— Groundwater, Lopez WTP
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.32 mg/LAverageLopez WTP | 4 mg/LMCL | Within the limit |
+By source (2)— Lopez WTP, Groundwater
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 3.4 ug/LAverageLopez WTP | None set | Within the limit |
+By source (2)— Lopez WTP, Groundwater
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.37 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
+By source (2)— Groundwater, Lopez WTP
| |||
| SeleniumA trace element from natural deposits and industrial discharge. | 1.8 ug/LAverageGroundwater | None set | Within the limit |
+By source (2)— Groundwater, Lopez WTP
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.031 mg/LAverageLopez WTP | 2 mg/LMCL | Within the limit |
+By source (2)— Lopez WTP, Groundwater
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/L90th percentileAt the tap | None set | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 0–0.054 mg/LAverageState Water | None set | Detected — no federal limit |
+By source (2)— Groundwater, Lopez WTP
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3 pCi/LAverageLopez WTP | 15 pCi/LMCL | Within the limit |
+By source (2)— Lopez WTP, Groundwater
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 116 ug/LAverageLopez WTP | None set | Within the limit |
+By source (2)— Lopez WTP, Groundwater
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Highest single sampleNo. of Detections in any month | None set | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 1Highest single sampleNo. of Detections in any month | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 3.6 mg/LAverageState Water | None set | Detected — no federal limit |
+By source (2)— Groundwater, Lopez WTP
| |||
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.25Reported levelState Water Conventional Treatment | None set | Detected — no federal limit |
Source: City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA's 2022 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA's water
+Is City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA tap water safe to drink in 2022?
Every one of the 18 contaminants measured in City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA's 2022 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA tap water?
18 contaminants were measured in City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA's 2022 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 6 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA's 2022 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is City of Arroyo Grande Utilities Division — Arroyo Grande, Ca, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2022 report; a new report will replace it once the utility publishes its next annual update.
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