Drinking water quality · 2024
· Verified
What's in City of Murrieta, CA tap water
31 contaminants were measured in the City of Murrieta, CA water system's 2024 annual report. Each is shown below against its federal limit — 5 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 31
- Over federal limit
- 5
- Approaching the limit
- 1
- Worst contaminant
- Bromate
- Service area
- CA
190.0× the limit
state-level CCR
At or above the federal limit
- BromateDisinfection byproducts · Reported level0–19 ug/Llimit 0.1 ug/L · 190.0× the limit
- TTHMDisinfection byproducts · Reported level16–67 ug/Llimit 1 ug/L · 67.0× the limit
- LeadMetals · Reported level90 ug/Llimit 15 ug/L · 6.0× the limit
- pHPhysical & aggregate · Reported level6.3–8.1limit 6.5 · 1.2× the limit
- ChlorineDisinfectants · Reported level0–4.3 mg/Llimit 4 mg/L · 1.1× the limit
Approaching the limit (≥ 80%)
PFAS — EPA UCMR5 (2023–2025)
2 PFAS compounds above EPA limits in City of Murrieta, CA
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFOS (Perfluorooctane sulfonic acid)
● Over EPA limit (1.4×)Measured 5.7 ng/LEPA limit 4 ng/LSample year 2025Samples 1 detect / 1
below national p90 (19.900000000000006 ng/L across detecting U.S. systems)
PFOA (Perfluorooctanoic acid)
● Over EPA limit (1.4×)Measured 5.5 ng/LEPA limit 4 ng/LSample year 2025Samples 1 detect / 1
below national p90 (13.649999999999999 ng/L across detecting U.S. systems)
PFHxS (Perfluorohexane sulfonic acid)
● Below limitMeasured 4.1 ng/LEPA limit 10 ng/LSample year 2025Samples 1 detect / 1
below national p90 (12.049999999999997 ng/L across detecting U.S. systems)
Lithium
● Detected (no federal limit)Measured 37 mg/LSample year 2024Samples 2 detect / 4
below national p90 (76.59999999999991 mg/L across detecting U.S. systems)
PWSID CA3310036 · Source: EPA UCMR5. Limits per EPA's April 2024 PFAS National Primary Drinking Water Regulation. PFAS values reported in nanograms per liter (ng/L) — note that 1 ng/L = 1 part per trillion.
Where your water comes from · EPA SDWIS
City of Murrieta, CA's drinking water comes from ground water, drawn from 2 sources.
Source
2ground water
- NEW CLAY WELL
- NORTH
Treatment
2treatment plants
- NORTH WELL 2 - WATER TREATMENT PLANT
- NEW CLAY WELL - TREATED XCLD
Distribution
0storage units
Also buys water from EASTERN MUNICIPAL WD, ELSINORE VALLEY MWD.
Source: EPA SDWIS facilities inventory. Methodology.
Historical readings · EPA Six-Year Review (2012–2019)
1 contaminant historically over EPA limits in City of Murrieta, 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) |
|---|---|---|---|
ARSENIC worst: 2013 | 0.028 mg/L 2.8× 2.1× the national p90 | 0.01 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2016 | 0.028 mg/L within | 0.06 mg/L | '12'14'15'16'17'18'19 |
TTHM worst: 2018 | 0.031 mg/L within | 0.08 mg/L | '12'14'15'16'17'18'19 |
FLUORIDE worst: 2015 | 0.9 mg/L within | 4 mg/L | '12'14'15'18 |
BARIUM worst: 2015 | 0.31 mg/L within above national p90 | 2 mg/L | '12'15'18 |
SELENIUM worst: 2015 | 0.0062 mg/L within | 0.05 mg/L | '15 |
NITRATE worst: 2014 | 0.362 mg/L within | 10 mg/L | '12'13'14'15'16 |
URANIUM worst: 2015 | 0.00243 ug/L within below national p90 | 30 ug/L | '14'15 |
COPPER worst: 2016 | 0.7 mg/L near national p90 | — | '16 |
DBAA worst: 2012 | 0.0026 mg/L | — | '12'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.0017 mg/L | — | '12'14'15'16'17'18'19 |
MBAA worst: 2012 | 0.0016 mg/L | — | '12'14'15'19 |
MCAA worst: 2012 | 0.0052 mg/L | — | '12'14'15'16'17'19 |
TCAA worst: 2012 | 0.0013 mg/L | — | '12'14'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0047 mg/L | — | '12'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.004 mg/L | — | '12'14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.0026 mg/L | — | '12'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0067 mg/L | — | '12'14'15'16'17'18'19 |
PWSID CA3310036 · 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.
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 0–19 ug/LReported levelMills | 0.1 ug/LPublic health goal | At or above the limit |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 2.3 ug/LAveragePerris Valley Wells M | 6 ug/LMCL | Within the limit |
+By source (8)— Perris Valley Wells M, Skinner Filtration Plant, Hemet Filtration Plant +5 more
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 90 ug/LReported levelEast Valley | 15 ug/LAction level | At or above the limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 1.2 ug/LAveragePerris Valley Wells M | 10 ug/LMCL | Within the limit |
+By source (8)— Perris Valley Wells M, North Perris Wells, Mills Filtration Plant +5 more
| |||
| AluminumA common element sometimes used as a treatment coagulant. | 74 ug/LAverageSkinner Filtration Plant | 1000 ug/LMCL | Within the limit |
+By source (8)— Skinner Filtration Plant, Mills Filtration Plant, North Perris Wells +5 more
| |||
| IronA naturally occurring metal common in groundwater. | Not detected ug/LAverageDesalination Complex L | 300 ug/LMCL | Within the limit |
+By source (8)— Desalination Complex L, East Valley Wells, Skinner Filtration Plant +5 more
| |||
| ManganeseA naturally occurring metal from soil and rock. | Not detected ug/LAverageHemet Filtration Plant | 50 ug/LMCL | Within the limit |
+By source (8)— Desalination Complex L, Hemet Filtration Plant, Skinner Filtration Plant +5 more
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| pHA measure of how acidic or basic the water is. | 6.3–8.1Reported levelMills | 6.5MCL | At or above the limit |
+By source (2)— EMWD's Entire Distribution System, East Valley
| |||
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 826 mg/LAveragePerris Valley Wells M | 1000 mg/LMCL | Approaching the limit |
+By source (8)— Perris Valley Wells M, Perris Filtration Plant, East Valley Wells +5 more
| |||
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 1120 uS/cmAveragePerris Valley Wells M | 1600 uS/cmMCL | Within the limit |
+By source (8)— Perris Filtration Plant, Perris Valley Wells M, East Valley Wells +5 more
| |||
| OdorA measure of detectable smell in the water. | 1Reported levelSkinner | 3MCL | Within the limit |
+By source (3)— North Perris, East Valley, EMWD's Entire Distribution System
| |||
| ColorA measure of visible tint in the water. | 2AverageMills Filtration Plant | 15MCL | Within the limit |
+By source (10)— East Valley, EMWD's Entire Distribution System, Hemet Filtration Plant +7 more
| |||
| TurbidityA measure of cloudiness from suspended particles in the water. | Not detected NTUAveragePerris Filtration Plant | 5 NTUMCL | Within the limit |
+By source (11)— East Valley, EMWD's Entire Distribution System, North Perris Wells +8 more
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0–4.3 mg/LReported levelEMWD's Entire Distribution System | 4 mg/LMRDL | At or above the limit |
+By source (4)— EMWD's Entire Distribution System, East Valley, City of Perris +1 more
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorideA naturally occurring salt compound. | 233 mg/LAveragePerris Valley Wells M | 500 mg/LMCL | Within the limit |
+By source (8)— Perris Valley Wells M, Desalination Complex L, Perris Filtration Plant +5 more
| |||
| SulfateA naturally occurring mineral from rock and soil. | 199 mg/LAverageSkinner Filtration Plant | 500 mg/LMCL | Within the limit |
+By source (8)— Perris Filtration Plant, Skinner Filtration Plant, East Valley Wells +5 more
| |||
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | Not detected mg/LAverageHemet Filtration Plant | 1 mg/LMCL | Within the limit |
+By source (8)— Perris Filtration Plant, Hemet Filtration Plant, Desalination Complex L +5 more
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 18.6 pCi/LAverageHemet Filtration Plant | 50 pCi/LMCL | Within the limit |
+By source (7)— East Valley Wells, Hemet Filtration Plant, Desalination Complex L +4 more
| |||
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 5.2 pCi/LAveragePerris Valley Wells M | 15 pCi/LMCL | Within the limit |
+By source (8)— East Valley Wells, Perris Valley Wells M, Desalination Complex L +5 more
| |||
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.48 pCi/LAverageNorth Perris Wells | 5 pCi/LMCL | Within the limit |
+By source (8)— North Perris Wells, Mills Filtration Plant, Perris Valley Wells M +5 more
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported levelCity of Perris | 0MCLG | None detected |
+By source (4)— City of Perris, North Perris, EMWD's Entire Distribution System +1 more
| |||
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 5Reported levelEMWD's Entire Distribution System | 0MCLG | Detected — no federal limit |
+By source (4)— EMWD's Entire Distribution System, East Valley, North Perris +1 more
| |||
Source: City of Murrieta, 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 City of Murrieta, CA's water
+Is City of Murrieta, CA tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the City of Murrieta, CA water utility lists 5 contaminants at or above the federal limit: Bromate, TTHM, Lead, pH, and Chlorine. 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 City of Murrieta, CA tap water?
31 contaminants were measured in City of Murrieta, CA's 2024 Consumer Confidence Report, spanning metals, physical & aggregate, and inorganic chemicals. 30 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 City of Murrieta, CA tap water?
5 contaminants in City of Murrieta, CA's 2024 report sit at or above the federal limit: Bromate (190.0× the limit); TTHM (67.0× the limit); Lead (6.0× the limit); pH (1.2× the limit); Chlorine (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 City of Murrieta, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is Bromate, at 190.0× the federal threshold. It belongs to the disinfection byproducts family of contaminants.
+Are any contaminants in City of Murrieta, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Total Dissolved Solids. 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 City of Murrieta, 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 City of Murrieta, 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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