Drinking water quality · 2023
· Verified
What's in Pismo Beach Water Department — Pismo Beach, Ca, CA tap water
28 contaminants were measured in the Pismo Beach Water Department — Pismo Beach, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 3 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 28
- Over federal limit
- 3
- Approaching the limit
- 1
- Worst contaminant
- TTHM
- Service area
- CA
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 34–110 ug/LRangeDelivered (Lopez and State Water) | None set | At or above the limit |
+By source (2)— Delivered (Lopez and State Water), Lopez WTP
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 64 ug/LReported levelSystem-wide | None set | At or above the limit |
+By source (2)— Delivered (Lopez and State Water), Lopez WTP
| |||
| Chlorite | 0.2–0.89 mg/LRangeLopez WTP | 1 mg/LMCL | Approaching the limit |
+By source (2)— Lopez WTP, Delivered (Lopez and State Water)
| |||
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 0.19–450 ug/LRangeDelivered (Lopez and State Water) | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Free | 2.5–4.18 mg/LRangeLopez WTP | 4 mg/LMCL | At or above the limit |
+By source (2)— Lopez WTP, Delivered (Lopez and State Water)
| |||
| Chromium | 0.099 ug/LReported levelState Water | None set | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 5 ug/LReported levelWell 05 | None set | Within the limit |
+By source (4)— Well 05, Well 22/23 (1990)/ Huber Well, Delivered (Lopez and State Water) +1 more
| |||
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 35 ug/LReported levelWell 22/23 (1990)/ Huber Well | None set | Within the limit |
+By source (2)— Well 22/23 (1990)/ Huber Well, Well 05
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.21 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.036 mg/LReported levelLopez WTP | 2 mg/LMCL | Within the limit |
+By source (2)— Lopez WTP, Delivered (Lopez and State Water)
| |||
| 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. | 0–0.071 mg/LRangeState Water | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 113 mg/LReported levelWell 05 | None set | Detected — no federal limit |
+By source (3)— Well 05, Lopez WTP, Delivered (Lopez and State Water)
| |||
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.048 ug/LReported levelLopez WTP | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 3.5 mg/LReported levelState Water | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 57 mg/LReported levelState Water | None set | Detected — no federal limit |
+By source (3)— Well 05, Delivered (Lopez and State Water), Lopez WTP
| |||
| Vanadium | 15 ug/LReported levelSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 7.4 pCi/LReported levelWell 05 | 15 pCi/LMCL | Within the limit |
+By source (4)— Well 05, Lopez WTP, Well 22/23 (1990)/ Huber Well +1 more
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 5.67 pCi/LReported levelWell 22/23 (1990)/ Huber Well | 20 pCi/LMCL | Detected — no federal limit |
+By source (2)— Well 22/23 (1990)/ Huber Well, Well 05
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 2.3 mg/LReported levelWell 05 | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.32 mg/LReported levelDelivered (Lopez and State Water) | 4 mg/LMCL | Within the limit |
+By source (3)— Delivered (Lopez and State Water), Lopez WTP, Well 22/23 (1990)/ Huber Well
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.15 NTUReported levelState Water | None set | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 350 mg/LReported levelWell 05 | None set | Detected — no federal limit |
+By source (3)— Well 05, Lopez WTP, Delivered (Lopez and State Water)
| |||
| Bicarbonate | 430 mg/LReported levelWell 05 | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 479 mg/LReported levelWell 05 | None set | Detected — no federal limit |
+By source (3)— Well 05, Delivered (Lopez and State Water), Lopez WTP
| |||
| pHA measure of how acidic or basic the water is. | 7.6–8.8RangeState Water | None set | Detected — no federal limit |
+By source (3)— Delivered (Lopez and State Water), Lopez WTP, Well 05
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 1.2–2.5 mg/LRangeState Water | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0–560 ug/LRangeLopez WTP | None set | Within the limit |
+By source (2)— Lopez WTP, Delivered (Lopez and State Water)
| |||
People also ask about Pismo Beach Water Department — Pismo Beach, Ca, CA's water
+Is Pismo Beach Water Department — Pismo Beach, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Pismo Beach Water Department — Pismo Beach, Ca, CA water utility lists 3 contaminants at or above the federal limit: TTHM, HAA5, and Chlorine Free. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Pismo Beach Water Department — Pismo Beach, Ca, CA tap water?
28 contaminants were measured in Pismo Beach Water Department — Pismo Beach, Ca, CA's 2023 Consumer Confidence Report, spanning metals, physical & aggregate, and disinfection byproducts. 8 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Pismo Beach Water Department — Pismo Beach, Ca, CA tap water?
3 contaminants in Pismo Beach Water Department — Pismo Beach, Ca, CA's 2023 report sit at or above the federal limit: TTHM (1.4× the limit); HAA5 (1.1× the limit); Chlorine Free (1.0× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Pismo Beach Water Department — Pismo Beach, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is TTHM, at 1.4× the federal threshold. It belongs to the disinfection byproducts family of contaminants.
+Are any contaminants in Pismo Beach Water Department — Pismo Beach, Ca, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Chlorite. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Pismo Beach Water Department — Pismo Beach, Ca, CA's 2023 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 Pismo Beach Water Department — Pismo Beach, 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 2023 report; a new report will replace it once the utility publishes its next annual update.