Drinking water quality · 2024
· Verified
What's in Chula Vista Sweetwater, CA tap water
37 contaminants were measured in the Chula Vista Sweetwater, CA water system's 2024 annual report. Each is shown below against its federal limit — 7 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 37
- Over federal limit
- 7
- Approaching the limit
- 0
- Worst contaminant
- Perfluorobutanesulfonic acid
- Service area
- CA
11.0× the limit
state-level CCR
At or above the federal limit
- Perfluorobutanesulfonic acidPFAS ("forever chemicals") · Reported level0–11 ng/Llimit 1 ng/L · 11.0× the limit
- PFOSPFAS ("forever chemicals") · Reported level0–33 ng/Llimit 4 ng/L · 8.3× the limit
- ChlorateDisinfection byproducts · Reported level130–4306 ug/Llimit 800 ug/L · 5.4× the limit
- Perfluorohexanesulfonic acidPFAS ("forever chemicals") · Reported level0–26 ng/Llimit 10 ng/L · 2.6× the limit
- PFASPFAS ("forever chemicals") · Reported level0–2.6limit 1 · 2.6× the limit
- PFOAPFAS ("forever chemicals") · Reported level0–9.4 ng/Llimit 4 ng/L · 2.4× the limit
- TTHMDisinfection byproducts · Reported level4.6–85.46 ug/Llimit 80 ug/L · 1.1× the limit
Where your water comes from · EPA SDWIS
Chula Vista Sweetwater, CA buys its drinking water from BOULDER CITY OF.
Source
0sources
Treatment
0treatment plants
Distribution
0storage units
Also buys water from BOULDER CITY OF.
Source: EPA SDWIS facilities inventory. Methodology.
Historical readings · EPA Six-Year Review (2012–2019)
8 historically-detected contaminants in Chula Vista Sweetwater, CA
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
HAA5 worst: 2019 | 0.0555 mg/L 93% | 0.06 mg/L | '19 |
TTHM worst: 2019 | 0.0692 mg/L 87% | 0.08 mg/L | '19 |
DCAA worst: 2019 | 0.0206 mg/L | — | '19 |
MCAA worst: 2019 | 0.0018 mg/L | — | '19 |
TCAA worst: 2019 | 0.0331 mg/L | — | '19 |
BROMODICHLOROMETHANE worst: 2019 | 0.0083 mg/L | — | '19 |
CHLOROFORM worst: 2019 | 0.0602 mg/L | — | '19 |
DIBROMOCHLOROMETHANE worst: 2019 | 0.0007 mg/L | — | '19 |
PWSID CO0107810 · Source: EPA Six-Year Review 4 (2012–2019). Values are the highest detection in each calendar year; non-detect years are omitted. Year tags above show every year with a detection.
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 0–11 ng/LReported levelSD Formation Wells 1 - 11 | 1 ng/LMCL | At or above the limit |
+By source (6)— SD Formation Wells 1 - 11, Treated¹ Sweetwater Authority Drinking Water, National City Well 3 +3 more
| |||
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 0–33 ng/LReported levelSD Formation Wells 1 - 11 | 4 ng/LMCL | At or above the limit |
+By source (6)— SD Formation Wells 1 - 11, Treated¹ Sweetwater Authority Drinking Water, National City Well 4 +3 more
| |||
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 0–26 ng/LReported levelSD Formation Wells 1 - 11 | 10 ng/LMCL | At or above the limit |
+By source (6)— SD Formation Wells 1 - 11, Treated¹ Sweetwater Authority Drinking Water, National City Well 3 +3 more
| |||
| PFAS | 0–2.6Reported levelSD Formation Wells 1 - 11 | 1MCL | At or above the limit |
+By source (6)— SD Formation Wells 1 - 11, Treated¹ Sweetwater Authority Drinking Water, National City Well 4 +3 more
| |||
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 0–9.4 ng/LReported levelTreated¹ Sweetwater Authority Drinking Water | 4 ng/LMCL | At or above the limit |
+By source (6)— Treated¹ Sweetwater Authority Drinking Water, SD Formation Wells 1 - 11, National City Well 4 +3 more
| |||
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | 0–4.6 ng/LReported levelTreated¹ Sweetwater Authority Drinking Water | None set | Detected — no federal limit |
+By source (6)— Treated¹ Sweetwater Authority Drinking Water, National City Well 3, SD Formation Wells 1 - 11 +3 more
| |||
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–7.7 ng/LReported levelTreated¹ Sweetwater Authority Drinking Water | None set | Detected — no federal limit |
+By source (6)— Treated¹ Sweetwater Authority Drinking Water, SD Formation Wells 1 - 11, National City Well 4 +3 more
| |||
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–7.3 ng/LReported levelTreated¹ Sweetwater Authority Drinking Water | None set | Detected — no federal limit |
+By source (3)— Treated¹ Sweetwater Authority Drinking Water, SD Formation Wells 1 - 11, Lake Skinner Outlet (Aqueduct)
| |||
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–15 ng/LReported levelSD Formation Wells 1 - 11 | None set | Detected — no federal limit |
+By source (3)— SD Formation Wells 1 - 11, Treated¹ Sweetwater Authority Drinking Water, Lake Skinner Outlet (Aqueduct)
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 130–4306 ug/LReported levelTreated1 Sweetwater Authority Drinking Water | 800 ug/LNL | At or above the limit |
| Chlorite | 0.02–0.426 mg/LReported levelTreated1 Sweetwater Authority Drinking Water | 1 mg/LMCL | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–11.1 pCi/LReported levelSD Formation Wells 1 - 11 | 15 pCi/LMCL | Within the limit |
+By source (6)— SD Formation Wells 1 - 11, Lake Skinner Outlet (Aqueduct), National City Well 4 +3 more
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 0–8.5 pCi/LReported levelSD Formation Wells 1 - 11 | 20 pCi/LMCL | Within the limit |
+By source (6)— SD Formation Wells 1 - 11, Lake Skinner Outlet (Aqueduct), Sweetwater Reservoir +3 more
| |||
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.6–1.4 pCi/LReported levelSD Formation Wells 1 - 11 | 5 pCi/LMCL | Within the limit |
+By source (6)— SD Formation Wells 1 - 11, Sweetwater Reservoir, National City Well 2 +3 more
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 4.7–7.4 pCi/LReported levelSD Formation Wells 1 - 11 | 50 pCi/LMCL | Within the limit |
+By source (3)— SD Formation Wells 1 - 11, Lake Skinner Outlet (Aqueduct), Sweetwater Reservoir
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 3Reported levelNational City Well 3 | 5MCL | Within the limit |
+By source (8)— National City Well 3, SD Formation Wells 1- 11, Lake Skinner Outlet (Aqueduct) +5 more
| |||
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported levelTreated Sweetwater Authority Drinking Water | 0MCL | None detected |
+By source (8)— Treated Sweetwater Authority Drinking Water, Sweetwater Reservoir, National City Well 3 +5 more
| |||
| Cryptosporidium | 0–3Reported levelSweetwater Reservoir | None set | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BoronA naturally occurring element from rock and soil. | 0.08–0.54 mg/LReported levelSD Formation Wells 1 - 11 | 1 mg/LNL | Within the limit |
+By source (7)— SD Formation Wells 1 - 11, Treated¹ Sweetwater Authority Drinking Water, National City Well 3 +4 more
| |||
| SeleniumA trace element from natural deposits and industrial discharge. | 0–19 ug/LReported levelSD Formation Wells 1 - 11 | 50 ug/LMCL | Within the limit |
+By source (7)— SD Formation Wells 1 - 11, Lake Skinner Outlet (Aqueduct), National City Well 3 +4 more
| |||
| Vanadium | 14–19 ug/LReported levelNational City Well 2 | 50 ug/LNL | Within the limit |
+By source (7)— National City Well 2, National City Well 4, Treated¹ Sweetwater Authority Drinking Water +4 more
| |||
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0–3.4 ug/LReported levelSD Formation Wells 1 - 11 | 10 ug/LMCL | Within the limit |
+By source (7)— SD Formation Wells 1 - 11, Sweetwater Reservoir, National City Well 4 +4 more
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.313 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.1–0.2 mg/LReported levelSD Formation Wells 1 - 11 | 1 mg/LMCL | Within the limit |
+By source (7)— SD Formation Wells 1 - 11, National City Well 4, National City Well 2 +4 more
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 3 ug/L90th percentileAt the tap | 15 ug/LAction level | Within the limit |
| ManganeseA naturally occurring metal from soil and rock. | 0–10 ug/LReported levelTreated1 Sweetwater Authority Drinking Water | 50 ug/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 0–70 ug/LReported levelSweetwater Reservoir | 1000 ug/LMCL | Within the limit |
+By source (7)— Sweetwater Reservoir, Lake Skinner Outlet (Aqueduct), Treated Sweetwater Authority Drinking Water +4 more
| |||
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0–0.4 ug/LReported levelTreated Sweetwater Authority Drinking Water | 10 ug/LMCL | Within the limit |
+By source (7)— Treated Sweetwater Authority Drinking Water, SD Formation Wells 1 - 11, Sweetwater Reservoir +4 more
| |||
| LithiumA naturally occurring element found in some groundwater. | 0–13.6 ug/LReported levelTreated¹ Sweetwater Authority Drinking Water | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.5–0.9 mg/LReported levelTreated Sweetwater Authority Drinking Water | 2 mg/LMCL | Within the limit |
+By source (7)— Treated Sweetwater Authority Drinking Water, SD Formation Wells 1 - 11, National City Well 3 +4 more
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0–1 mg/LReported levelSD Formation Wells 1 - 11 | 10 mg/LMCL | Within the limit |
+By source (7)— SD Formation Wells 1 - 11, National City Well 2, Treated Sweetwater Authority Drinking Water +4 more
| |||
| BromideA naturally occurring salt found in source water. | 81–420 ug/LReported levelLake Skinner Outlet (Aqueduct) | None set | Detected — no federal limit |
+By source (2)— Sweetwater Reservoir, Lake Skinner Outlet (Aqueduct)
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia. | 0.2–4.66 mg/LReported levelTreated1 Sweetwater Authority Drinking Water | 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. | 2.9–12 mg/LReported levelLake Skinner Outlet (Aqueduct) | None set | Detected — no federal limit |
+By source (2)— Lake Skinner Outlet (Aqueduct), Sweetwater Reservoir
| |||
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.27 NTUReported levelTreated Sweetwater Authority Drinking Water | None set | Detected — no federal limit |
Source: Chula Vista Sweetwater, CA's 2024 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 Chula Vista Sweetwater, CA's water
+Is Chula Vista Sweetwater, CA tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Chula Vista Sweetwater, CA water utility lists 7 contaminants at or above the federal limit: Perfluorobutanesulfonic acid, PFOS, Chlorate, Perfluorohexanesulfonic acid, PFAS, PFOA, and TTHM. 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 Chula Vista Sweetwater, CA tap water?
37 contaminants were measured in Chula Vista Sweetwater, CA's 2024 Consumer Confidence Report, spanning metals, pfas ("forever chemicals"), and disinfection byproducts. 26 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 Chula Vista Sweetwater, CA tap water?
7 contaminants in Chula Vista Sweetwater, CA's 2024 report sit at or above the federal limit: Perfluorobutanesulfonic acid (11.0× the limit); PFOS (8.3× the limit); Chlorate (5.4× the limit); Perfluorohexanesulfonic acid (2.6× the limit); PFAS (2.6× the limit); PFOA (2.4× the limit); TTHM (1.1× 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 Chula Vista Sweetwater, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is Perfluorobutanesulfonic acid, at 11.0× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Chula Vista Sweetwater, CA's 2024 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 Chula Vista Sweetwater, 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 2024 report; a new report will replace it once the utility publishes its next annual update.
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