PFAS Contamination

PFAS in California Drinking Water

Ranked by number of PFAS compounds detected · Data from EPA SDWIS & UCMR

466

Cities Tested

124

Exceeds Limit

27%

% Exceeds Limit

2.2 compounds

State Avg

▲ 6% vs national

vs National

624

Health Violations

Analysis

PFAS in California: what the data shows

California has 466 cities with PFAS monitoring data from the EPA's UCMR 5 program. PFAS ("forever chemicals") were detected in 312 of those cities (67%), with many cities exceeding the EPA's 2024 maximum contaminant levels of 4 ppt. The state average is worse than the national average. 124 cities exceed the EPA MCL for at least one PFAS compound. PFAS are linked to cancer, immune system disruption, and developmental issues. The 2024 EPA rule requires water systems exceeding the MCL to notify customers and reduce levels by 2029. PFAS data comes from the EPA's Unregulated Contaminant Monitoring Rule 5 (UCMR 5), which required large water systems to test for 29 PFAS compounds between 2023–2025. Not all systems have completed testing — cities without data may still have PFAS present.

Comparison

Cities exceeding EPA MCL (4 ppt each)

California

27%

124 of 466 cities

→ ▲ 6% above national rate (worse)

National avg

21%

1662 of 7853 cities

City Map

PFAS data across California

Each dot is a city, colored by overall water quality grade. PFAS-tested cities are shown; those exceeding the 4 ppt EPA MCL appear in red. Size reflects population served.

Worst Offenders

Top 10 cities by pfas level in California

Highest PFAS levels (compounds)

All Cities

All California cities ranked by pfas level

#	City	Level	Exceeds?	Violations	Grade
1	Running Springs	11 compounds	Yes	3	B
2	Fresno	10 compounds	Yes	523	F
3	Clovis	10 compounds	Yes	221	F
4	Montebello	10 compounds	Yes	5	B
5	Atwater	10 compounds	Yes	3	B+
6	Grand Terrace	10 compounds	Yes	1	B
7	San Jose	9 compounds	Yes	142	F
8	Sacramento	9 compounds	Yes	425	F
9	Downey	9 compounds	Yes	14	B
10	Newhall	9 compounds	Yes	1	B+
11	San Dimas	9 compounds	Yes	6	B-
12	Chula Vista	9 compounds	Yes	1	B+
13	Glendale	9 compounds	Yes	0	A-
14	Pleasanton	9 compounds	Yes	3	B-
15	Temecula	9 compounds	Yes	12	C+
16	Fullerton	9 compounds	Yes	8	B
17	South Lake Tahoe	9 compounds	Yes	15	C
18	Pacific Grove	9 compounds	Yes	15	B-
19	Porterville	9 compounds	Yes	74	F
20	Pico Rivera	9 compounds	Yes	4	B
21	Ukiah	9 compounds	Yes	14	C+
22	Los Osos	9 compounds	Yes	0	B+
23	Anaheim	8 compounds	Yes	8	C+
24	Covina	8 compounds	Yes	10	B
25	Modesto	8 compounds	Yes	76	D
26	Orange	8 compounds	Yes	3	B
27	Redding	8 compounds	Yes	49	F
28	Highland	8 compounds	Yes	3	B+
29	Hesperia	8 compounds	Yes	2	B
30	Gilroy	8 compounds	Yes	28	C+
31	Ceres	8 compounds	Yes	129	F
32	Paso Robles	8 compounds	Yes	42	F
33	Atascadero	8 compounds	Yes	1	B
34	Tehachapi	8 compounds	Yes	96	F
35	Altadena	8 compounds	Yes	2	B+
36	Norco	8 compounds	Yes	39	F
37	Crestline	8 compounds	Yes	9	C+
38	Pinedale	8 compounds	Yes	7	A-
39	Big Bear City	8 compounds	Yes	1	A
40	Bell Gardens	8 compounds	Yes	0	B
41	Lake Arrowhead	8 compounds	Yes	0	A-
42	Helendale	8 compounds	Yes	22	A-
43	La Habra Heights	8 compounds	Yes	0	A
44	Riverside	7 compounds	Yes	13	C
45	Pomona	7 compounds	Yes	6	C+
46	Garden Grove	7 compounds	Yes	2	B
47	Rialto	7 compounds	Yes	6	B+
48	Santa Monica	7 compounds	Yes	0	B
49	Whittier	7 compounds	Yes	4	C+
50	Lodi	7 compounds	Yes	16	C+
51	Watsonville	7 compounds	Yes	74	F
52	La Crescenta	7 compounds	Yes	3	B+
53	Arroyo Grande	7 compounds	Yes	93	F
54	El Verano	7 compounds	Yes	0	B+
55	West Covina	7 compounds	Yes	25	F
56	Coarsegold	7 compounds	Yes	24	C-
57	San Francisco	7 compounds	No	100	F
58	Santa Ana	6 compounds	Yes	8	C
59	Bakersfield	6 compounds	Yes	690	F
60	Stockton	6 compounds	Yes	261	F
61	Ontario	6 compounds	Yes	1	B+
62	Camarillo	6 compounds	Yes	4	B
63	South Gate	6 compounds	Yes	2	B
64	Santa Fe Springs	6 compounds	Yes	1	B+
65	Apple Valley	6 compounds	Yes	57	D
66	Colton	6 compounds	Yes	5	B-
67	Valley Center	6 compounds	Yes	15	F
68	Monrovia	6 compounds	Yes	0	B+
69	Norwalk	6 compounds	Yes	1	A-
70	Gridley	6 compounds	Yes	4	B
71	Nuevo	6 compounds	Yes	6	B+
72	Brisbane	6 compounds	Yes	5	A-
73	Wildomar	6 compounds	Yes	11	A-
74	Hawthorne	5 compounds	No	3	B
75	Rosemead	5 compounds	Yes	17	C-
76	San Bernardin0	5 compounds	No	0	A-
77	Corona	5 compounds	No	81	D
78	San Bernardino	5 compounds	No	192	F
79	Vacaville	5 compounds	Yes	26	F
80	Encinitas	5 compounds	Yes	55	F
81	Lynwood	5 compounds	Yes	0	B+
82	Montclair	5 compounds	Yes	0	B+
83	Fair Oaks	5 compounds	Yes	0	B+
84	Big Bear Lake	5 compounds	Yes	1	B+
85	Cudahy	5 compounds	Yes	3	B+
86	Pala	5 compounds	Yes	30	C-
87	El Monte	4 compounds	Yes	79	F
88	Merced	4 compounds	Yes	9	C+
89	Manteca	4 compounds	Yes	39	B-
90	Redlands	4 compounds	Yes	2	B
91	Compton	4 compounds	Yes	8	B
92	Tustin	4 compounds	Yes	8	B
93	Yucaipa	4 compounds	Yes	9	C+
94	Truckee	4 compounds	Yes	7	A-
95	Rohnert Park	4 compounds	Yes	21	F
96	Morgan Hill	4 compounds	No	92	F
97	Sonora	4 compounds	No	25	D+
98	Huntington Park	4 compounds	Yes	3	B+
99	Lakeside	4 compounds	Yes	0	A-
100	Yucca Valley	4 compounds	No	7	A-
101	Sanger	4 compounds	Yes	16	C
102	Red Bluff	4 compounds	Yes	23	F
103	Ripon	4 compounds	Yes	10	A-
104	Lindsay	4 compounds	Yes	240	F
105	Maywood	4 compounds	Yes	3	A-
106	Calimesa	4 compounds	No	6	B
107	Castaic	4 compounds	Yes	17	F
108	Calistoga	4 compounds	Yes	15	C+
109	Irvine	3 compounds	No	84	F
110	Huntington Beach	3 compounds	Yes	5	C-
111	Jurupa Valley	3 compounds	No	62	B
112	Palmdale	3 compounds	No	15	C+
113	Ventura	3 compounds	No	21	D+
114	Azusa	3 compounds	Yes	2	B+
115	Burbank	3 compounds	No	1	A-
116	Westminster	3 compounds	Yes	2	A-
117	Goleta	3 compounds	No	11	B
118	Placentia	3 compounds	No	0	B+
119	Buena Park	3 compounds	Yes	1	B+
120	Upland	3 compounds	No	4	B+
121	Camp Pendleton	3 compounds	No	13	B
122	Adelanto	3 compounds	Yes	13	C
123	Lathrop	3 compounds	Yes	44	B
124	Phelan	3 compounds	No	0	B+
125	Benicia	3 compounds	No	1	A-
126	Rancho Santa Fe	3 compounds	No	3	A-
127	Lomita	3 compounds	Yes	1	A-
128	Rio Linda	3 compounds	No	2	A-
129	Clearlake	3 compounds	No	5	B+
130	Sonoma	3 compounds	Yes	5	B-
131	Scotts Valley	3 compounds	No	11	B-
132	Healdsburg	3 compounds	No	12	B+
133	Templeton	3 compounds	No	1	A
134	Villa Park	3 compounds	No	1	A-
135	Planada	3 compounds	Yes	3	B+
136	Laton	3 compounds	Yes	49	C+
137	Escondido	2 compounds	No	10	B
138	Lake Elsinore	2 compounds	No	8	A
139	Rancho Cordova	2 compounds	No	115	F
140	Santee	2 compounds	No	14	B
141	Inglewood	2 compounds	Yes	3	A-
142	Lakewood	2 compounds	Yes	1	A-
143	Laguna Beach	2 compounds	No	2	B
144	Monterey Park	2 compounds	No	1	B
145	Fountain Valley	2 compounds	No	0	A
146	Rowland Heights	2 compounds	No	0	B+
147	Lincoln	2 compounds	Yes	6	A-
148	Hollister	2 compounds	Yes	132	F
149	Lake Forest	2 compounds	No	38	B-
150	Arcadia	2 compounds	Yes	2	B
151	Banning	2 compounds	No	15	B-
152	Cerritos	2 compounds	Yes	0	B
153	Bellflower	2 compounds	Yes	0	B+
154	Elk Grove	2 compounds	No	28	C
155	Carmichael	2 compounds	No	1	B+
156	Loma Linda	2 compounds	Yes	3	A
157	Oroville	2 compounds	Yes	7	C-
158	Boulder Creek	2 compounds	No	119	F
159	Alpine	2 compounds	No	25	C-
160	Live Oak	2 compounds	No	26	A-
161	Delhi	2 compounds	Yes	7	A-
162	Solvang	2 compounds	No	6	B
163	Winters	2 compounds	No	1	A+
164	Wheatland	2 compounds	Yes	2	A
165	Weaverville	2 compounds	Yes	3	A-
166	Avalon	2 compounds	No	1	A-
167	Alturas	2 compounds	No	11	B+
168	Groveland	2 compounds	Yes	4	B-
169	Los Angeles	1 compounds	No	94	F
170	Oakland	1 compounds	No	13	B
171	San Diego	1 compounds	No	43	F
172	Perris	1 compounds	No	0	A
173	Long Beach	1 compounds	No	2	C
174	Alhambra	1 compounds	No	7	A-
175	La Mesa	1 compounds	No	0	A+
176	Palm Desert	1 compounds	No	12	C+
177	Spring Valley	1 compounds	No	4	B
178	Oxnard	1 compounds	No	49	F
179	Pasadena	1 compounds	No	92	F
180	Santa Rosa	1 compounds	No	177	F
181	Oceanside	1 compounds	No	2	A-
182	Laguna Hills	1 compounds	No	1	B+
183	Rancho Santa Margarita	1 compounds	No	0	A
184	Roseville	1 compounds	No	11	B
185	Placerville	1 compounds	No	6	A-
186	Victorville	1 compounds	No	1	B+
187	Vista	1 compounds	No	0	A-
188	Santa Clara	1 compounds	No	5	B
189	Santa Barbara	1 compounds	No	52	F
190	Davis	1 compounds	No	47	B+
191	San Marcos	1 compounds	No	27	D
192	Costa Mesa	1 compounds	No	2	A-
193	Santa Maria	1 compounds	No	36	F
194	Torrance	1 compounds	No	0	A-
195	Imperial Beach	1 compounds	No	1	A
196	Daly City	1 compounds	No	4	A
197	Walnut	1 compounds	No	1	A-
198	Tracy	1 compounds	No	45	C
199	Santa Cruz	1 compounds	No	38	F
200	Carlsbad	1 compounds	No	0	A+
201	Hemet	1 compounds	No	31	B-
202	Mountain View	1 compounds	No	3	A
203	Calabasas	1 compounds	No	14	A-
204	San Luis Obispo	1 compounds	No	27	F
205	Newport Beach	1 compounds	No	4	B+
206	Citrus Heights	1 compounds	No	2	A
207	Woodland	1 compounds	No	52	F
208	Brentwood	1 compounds	No	91	F
209	Salinas	1 compounds	No	639	F
210	La Habra	1 compounds	No	0	A-
211	Pittsburg	1 compounds	No	0	A
212	Fallbrook	1 compounds	No	3	A
213	Delano	1 compounds	No	67	B
214	Paramount	1 compounds	No	0	A-
215	San Clemente	1 compounds	No	3	A-
216	Lompoc	1 compounds	No	18	C
217	Poway	1 compounds	No	0	A-
218	Los Banos	1 compounds	No	29	B
219	Brea	1 compounds	No	0	A
220	El Centro	1 compounds	No	14	C-
221	Oakley	1 compounds	No	60	D
222	Ridgecrest	1 compounds	No	26	A-
223	San Bruno	1 compounds	No	0	A+
224	Soquel	1 compounds	No	1	A
225	Moorpark	1 compounds	No	1	A-
226	Beverly Hills	1 compounds	No	18	B
227	Calexico	1 compounds	No	7	B-
228	San Juan Capistrano	1 compounds	No	5	B+
229	Marina	1 compounds	No	4	A+
230	Ramona	1 compounds	No	36	C
231	Santa Paula	1 compounds	No	5	A-
232	Manhattan Beach	1 compounds	No	1	A-
233	Imperial	1 compounds	No	36	C+
234	Soledad	1 compounds	No	28	C+
235	Vernon	1 compounds	No	3	A
236	Wasco	1 compounds	No	26	B+
237	Brawley	1 compounds	No	5	A-
238	Patterson	1 compounds	No	35	B+
239	Seal Beach	1 compounds	No	0	A-
240	Quartz Hill	1 compounds	No	1	A-
241	Port Hueneme	1 compounds	No	0	B+
242	Cutten	1 compounds	No	5	A+
243	Lamont	1 compounds	No	40	B+
244	Chowchilla	1 compounds	Yes	25	A-
245	Greenfield	1 compounds	No	17	B
246	Twentynine Palms	1 compounds	No	70	B+
247	Rosamond	1 compounds	No	205	F
248	Oak View	1 compounds	No	12	B+
249	Lakeport	1 compounds	No	14	C-
250	Needles	1 compounds	No	45	F
251	Fillmore	1 compounds	No	13	B-
252	Discovery Bay	1 compounds	No	3	A+
253	El Segundo	1 compounds	No	0	A-
254	Blythe	1 compounds	No	143	D
255	Carpinteria	1 compounds	No	5	A
256	La Palma	1 compounds	No	0	A-
257	Fort Irwin	1 compounds	No	60	B+
258	Vandenberg Sfb	1 compounds	No	8	A
259	Westlake Village	1 compounds	No	8	F
260	California City	1 compounds	No	22	A-
261	Susanville	1 compounds	No	34	A-
262	Nipomo	1 compounds	No	1	A
263	Trabuco Canyon	1 compounds	No	2	A-
264	Tahoe City	1 compounds	No	11	B+
265	Dixon	1 compounds	No	2	A
266	El Cajon	1 compounds	No	24	B+
267	Newman	1 compounds	No	3	A-
268	Signal Hill	1 compounds	No	6	B
269	Ojai	1 compounds	No	35	C-
270	Edwards Afb	1 compounds	No	8	A-
271	Colusa	1 compounds	No	6	C-
272	Rio Vista	1 compounds	No	3	A+
273	La Canada Flintridge	1 compounds	No	4	A
274	La Canada	1 compounds	No	5	B
275	Mammoth Lakes	1 compounds	No	24	B
276	Guadalupe	1 compounds	No	0	A
277	Pismo Beach	1 compounds	No	4	A-
278	Firebaugh	1 compounds	No	89	D
279	Corning	1 compounds	No	17	B-
280	Gonzales	1 compounds	No	53	F
281	Santa Ynez	1 compounds	No	14	A-
282	Sebastopol	1 compounds	No	18	B-
283	Orland	1 compounds	No	5	A
284	Castroville	1 compounds	No	86	D+
285	Kirkwood	1 compounds	No	0	A
286	Represa	1 compounds	Yes	1	B
287	Fowler	1 compounds	No	2	A
288	Cotati	1 compounds	No	9	A-
289	Heber	1 compounds	No	15	A
290	Kelseyville	1 compounds	No	36	B-
291	Joshua Tree	1 compounds	No	3	A-
292	China Lake	1 compounds	No	8	A
293	Holtville	1 compounds	No	66	B-
294	St. Helena	1 compounds	No	29	C+
295	Hidden Valley Lake	1 compounds	No	1	A+
296	Gustine	1 compounds	No	4	B+
297	Williams	1 compounds	No	3	A+
298	Arnold	1 compounds	No	2	B-
299	Buellton	1 compounds	No	2	B+
300	Murphys	1 compounds	No	11	B+
301	Mojave	1 compounds	No	114	D
302	San Joaquin	1 compounds	No	13	A
303	Del Mar	1 compounds	No	3	B-
304	Quincy	1 compounds	No	6	A
305	Mariposa	1 compounds	No	71	C
306	Aptos	1 compounds	No	9	A-
307	Borrego Springs	1 compounds	No	2	A+
308	Skyforest	1 compounds	No	0	A-
309	Bolinas	1 compounds	No	49	A-
310	Barstow	1 compounds	No	66	F
311	Sea Ranch	1 compounds	No	4	B
312	Paicines	1 compounds	No	9	B-
313	Burlingame	0 compounds	No	14	A-
314	Fremont	0 compounds	No	3	B-
315	Fontana	0 compounds	No	0	A-
316	Rancho Cucamonga	0 compounds	No	0	B+
317	Concord	0 compounds	No	19	B-
318	Corte Madera	0 compounds	No	0	A-
319	Hayward	0 compounds	No	0	A-
320	Sunnyvale	0 compounds	No	3	A
321	Vallejo	0 compounds	No	6	A
322	Auburn	0 compounds	No	8	A
323	Fairfield	0 compounds	No	7	B-
324	Antioch	0 compounds	No	3	A
325	Chino	0 compounds	No	9	B
326	Simi Valley	0 compounds	No	3	A
327	Madera	0 compounds	No	564	D
328	Redwood City	0 compounds	No	10	B+
329	Napa	0 compounds	No	53	F
330	Folsom	0 compounds	No	1	A-
331	Indio	0 compounds	No	12	F
332	Milpitas	0 compounds	No	2	A-
333	Chino Hills	0 compounds	No	2	A
334	Palm Springs	0 compounds	No	16	B
335	Tulare	0 compounds	No	61	C-
336	Baldwin Park	0 compounds	No	1	A
337	Turlock	0 compounds	No	16	B-
338	Yuba City	0 compounds	No	24	A-
339	Palo Alto	0 compounds	No	8	A-
340	Beaumont	0 compounds	No	2	A-
341	Hanford	0 compounds	No	197	D+
342	Novato	0 compounds	No	3	B+
343	Petaluma	0 compounds	No	2	B
344	Grass Valley	0 compounds	No	8	A
345	West Sacramento	0 compounds	No	1	B+
346	Thousand Oaks	0 compounds	No	1	A
347	Glendora	0 compounds	No	0	A-
348	Desert Hot Springs	0 compounds	No	4	A
349	Coachella	0 compounds	No	11	C-
350	Lemoore	0 compounds	No	112	D
351	Lebec	0 compounds	No	42	C
352	Livermore	0 compounds	No	53	B
353	Pacifica	0 compounds	No	2	A
354	Foster City	0 compounds	No	2	A+
355	Stanford	0 compounds	No	3	A+
356	San Andreas	0 compounds	No	17	B-
357	East Palo Alto	0 compounds	No	8	A
358	La Verne	0 compounds	No	6	B+
359	Martinez	0 compounds	No	0	A
360	Granite Bay	0 compounds	No	43	B-
361	Belmont	0 compounds	No	3	A+
362	Eureka	0 compounds	No	3	A-
363	Oakdale	0 compounds	No	34	C-
364	Olivehurst	0 compounds	No	2	A
365	Reedley	0 compounds	No	12	B-
366	Windsor	0 compounds	No	2	A+
367	South Pasadena	0 compounds	No	5	A
368	Shafter	0 compounds	No	25	A-
369	Mountain House	0 compounds	No	1	A+
370	Riverbank	0 compounds	No	75	D
371	San Fernando	0 compounds	No	1	A+
372	Millbrae	0 compounds	No	1	A-
373	Corcoran	0 compounds	No	3	A
374	Menlo Park	0 compounds	No	2	A-
375	Arcata	0 compounds	No	3	A
376	San Jacinto	0 compounds	No	9	B
377	Marysville	0 compounds	No	11	B+
378	Temescal Valley	0 compounds	No	2	A
379	Anderson	0 compounds	No	14	C-
380	American Canyon	0 compounds	No	15	A-
381	Crescent City	0 compounds	No	14	C
382	Taft	0 compounds	No	0	A-
383	Arvin	0 compounds	No	81	C+
384	Half Moon Bay	0 compounds	No	6	A
385	Mckinleyville	0 compounds	No	2	A-
386	Sausalito	0 compounds	No	4	A+
387	Coalinga	0 compounds	No	267	D
388	Kerman	0 compounds	No	13	B
389	Orangevale	0 compounds	No	0	A
390	Sutter Creek	0 compounds	No	7	B+
391	Cupertino	0 compounds	No	3	A+
392	Moffett Field	0 compounds	No	1	A
393	29 Palms	0 compounds	No	3	B
394	Livingston	0 compounds	No	29	C-
395	Parlier	0 compounds	No	14	A-
396	La Puente	0 compounds	No	1	B+
397	Mcfarland	0 compounds	No	42	C+
398	Morro Bay	0 compounds	No	12	A-
399	Jackson	0 compounds	No	11	A-
400	Kingsburg	0 compounds	No	17	B
401	Avenal	0 compounds	No	35	B
402	South San Francisco	0 compounds	No	2	A
403	Grover Beach	0 compounds	No	34	F
404	Brooks	0 compounds	No	2	B+
405	Fortuna	0 compounds	No	7	B-
406	Hillsborough	0 compounds	No	7	A
407	King George	0 compounds	No	30	D+
408	Mendota	0 compounds	No	3	A
409	Shingle Springs	0 compounds	No	0	B+
410	Cloverdale	0 compounds	No	9	B
411	Sierra Madre	0 compounds	No	5	A
412	Farmersville	0 compounds	No	20	B+
413	Table Mountain	0 compounds	No	9	A-
414	Shasta Lake 4510007	0 compounds	No	1	A+
415	Willits	0 compounds	No	23	C-
416	Royal Oaks	0 compounds	No	201	D
417	Guerneville	0 compounds	No	3	A
418	Bishop	0 compounds	No	25	D
419	Winton	0 compounds	No	5	A-
420	Pauma Valley	0 compounds	No	88	F
421	Georgetown	0 compounds	No	4	B+
422	Orange Cove	0 compounds	No	10	B+
423	Bermuda Dunes	0 compounds	No	0	A+
424	Forestville	0 compounds	No	14	B-
425	Huron	0 compounds	No	69	B-
426	Paradise	0 compounds	No	2	A
427	Orosi	0 compounds	No	6	A+
428	Lancaster	0 compounds	No	204	D
429	Dinuba	0 compounds	No	24	A-
430	Yreka	0 compounds	No	9	B+
431	Earlimart	0 compounds	No	40	B
432	Fort Bragg	0 compounds	No	4	B
433	Lake Almanor	0 compounds	No	4	A-
434	Woodlake	0 compounds	No	14	A+
435	Oceano	0 compounds	No	1	A
436	Hughson	0 compounds	No	139	D+
437	Dos Palos	0 compounds	No	43	C
438	Escalon	0 compounds	No	13	A
439	Tahoe Vista	0 compounds	No	7	A-
440	Cottonwood	0 compounds	No	7	B
441	Foresthill	0 compounds	No	3	B+
442	Beale Afb	0 compounds	No	6	A
443	Los Altos Hills	0 compounds	No	4	A-
444	Cutler	0 compounds	No	20	B
445	Montara	0 compounds	No	3	A-
446	Rancho Murieta	0 compounds	No	3	A
447	Meadow Vista	0 compounds	No	0	A+
448	Keyes	0 compounds	No	60	B+
449	Cambria	0 compounds	No	4	A-
450	Hilmar	0 compounds	No	17	C
451	Denair	0 compounds	No	3	A
452	Visalia	0 compounds	No	121	D+
453	Ivanhoe	0 compounds	No	6	A-
454	Armona	0 compounds	No	71	B+
455	Angels Camp	0 compounds	No	21	B+
456	Yountville	0 compounds	No	4	A-
457	Ione	0 compounds	No	13	A-
458	Mount Shasta	0 compounds	No	11	B+
459	Hoopa	0 compounds	No	16	B+
460	Rio Dell	0 compounds	No	3	A
461	Littlerock	0 compounds	No	0	A
462	Terra Bella	0 compounds	No	26	A-
463	Tipton	0 compounds	No	15	B+
464	Carmel	0 compounds	No	49	C-
465	Blue Lake	0 compounds	No	1	A+
466	Lakehead	0 compounds	No	4	B

FAQ

Frequently asked questions about pfas in California

Does California tap water contain PFAS?

PFAS were detected in 312 of 466 California cities tested under EPA's UCMR 5 program. 124 cities exceed the 2024 EPA MCL of 4 ppt for individual PFAS compounds.

How can I remove PFAS from my drinking water in California?

Reverse osmosis (RO) systems are the most effective at removing PFAS, typically removing 90%+ of compounds. High-quality activated carbon block filters (NSF 58-certified for RO, or NSF 53 for solid carbon) also provide significant reduction. Standard pitcher filters vary widely in PFAS removal.

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