PFAS Detections in Colorado ZIP Codes — 2026

Out of 74 ZIP codes with data in Colorado, these are the highest-ranked areas for pfas status. See also: National ZIP Codes with PFAS Detections in Water | All Colorado Rankings

Statistic	Value
ZIP codes ranked	74
Highest value	0.1 ppt
Median value	0.0 ppt
State	Colorado

Top 74 Worst ZIP Codes

Rank	ZIP Code	City	State	PFAS Status	Safety Score
1	80817	Fountain	CO	0.1 ppt	33/100
2	80911	Colorado Springs	CO	0.1 ppt	44/100
3	80925	Colorado Springs	CO	0.1 ppt	47/100
4	80906	Colorado Springs	CO	0.0 ppt	50/100
5	80602	Brighton	CO	0.0 ppt	45/100
6	80603	Brighton	CO	0.0 ppt	41/100
7	81401	Montrose	CO	0.0 ppt	—
8	81403	Montrose	CO	0.0 ppt	—
9	80435	Dillon	CO	0.0 ppt	—
10	80915	Colorado Springs	CO	0.0 ppt	49/100
11	80922	Colorado Springs	CO	0.0 ppt	49/100
12	80928	Colorado Springs	CO	0.0 ppt	48/100
13	80939	Colorado Springs	CO	0.0 ppt	50/100
14	80951	Colorado Springs	CO	0.0 ppt	48/100
15	80601	Brighton	CO	0.0 ppt	47/100
16	80640	Henderson	CO	0.0 ppt	47/100
17	80108	Castle Rock	CO	0.0 ppt	41/100
18	80112	Englewood	CO	0.0 ppt	47/100
19	80124	Lone Tree	CO	0.0 ppt	48/100
20	80134	Parker	CO	0.0 ppt	41/100
21	80138	Parker	CO	0.0 ppt	44/100
22	80023	Broomfield	CO	0.0 ppt	—
23	80221	Denver	CO	0.0 ppt	45/100
24	80229	Denver	CO	0.0 ppt	47/100
25	80233	Denver	CO	0.0 ppt	47/100
26	80241	Thornton	CO	0.0 ppt	47/100
27	80260	Denver	CO	0.0 ppt	33/100
28	80482	Winter Park	CO	0.0 ppt	66/100
29	80022	Commerce City	CO	0.0 ppt	67/100
30	80024	Dupont	CO	0.0 ppt	67/100
31	80126	Littleton	CO	0.0 ppt	67/100
32	80129	Littleton	CO	0.0 ppt	67/100
33	80130	Littleton	CO	0.0 ppt	67/100
34	81067	Rocky Ford	CO	0.0 ppt	—
35	81416	Delta	CO	0.0 ppt	66/100
36	81435	Telluride	CO	0.0 ppt	33/100
37	80125	Littleton	CO	0.0 ppt	64/100
38	80015	Aurora	CO	0.0 ppt	49/100
39	80016	Aurora	CO	0.0 ppt	39/100
40	80111	Englewood	CO	0.0 ppt	48/100
41	80010	Aurora	CO	0.0 ppt	67/100
42	80011	Aurora	CO	0.0 ppt	67/100
43	80012	Aurora	CO	0.0 ppt	66/100
44	80013	Aurora	CO	0.0 ppt	65/100
45	80014	Aurora	CO	0.0 ppt	66/100
46	80017	Aurora	CO	0.0 ppt	67/100
47	80018	Aurora	CO	0.0 ppt	65/100
48	80019	Aurora	CO	0.0 ppt	66/100
49	80045	Aurora	CO	0.0 ppt	67/100
50	80102	Bennett	CO	0.0 ppt	67/100
51	80137	Watkins	CO	0.0 ppt	67/100
52	81230	Gunnison	CO	0.0 ppt	50/100
53	80110	Englewood	CO	0.0 ppt	63/100
54	80113	Englewood	CO	0.0 ppt	64/100
55	80120	Littleton	CO	0.0 ppt	64/100
56	80498	Silverthorne	CO	0.0 ppt	—
57	80104	Castle Rock	CO	0.0 ppt	64/100
58	80109	Castle Rock	CO	0.0 ppt	63/100
59	80503	Longmont	CO	0.0 ppt	49/100
60	80504	Longmont	CO	0.0 ppt	35/100
61	80513	Berthoud	CO	0.0 ppt	45/100
62	80534	Johnstown	CO	0.0 ppt	35/100
63	80537	Loveland	CO	0.0 ppt	33/100
64	80538	Loveland	CO	0.0 ppt	38/100
65	80542	Mead	CO	0.0 ppt	42/100
66	80543	Milliken	CO	0.0 ppt	36/100
67	80550	Windsor	CO	0.0 ppt	31/100
68	80651	Platteville	CO	0.0 ppt	34/100
69	81052	Lamar	CO	0.0 ppt	67/100
70	80465	Morrison	CO	0.0 ppt	50/100
71	80215	Denver	CO	0.0 ppt	67/100
72	80228	Denver	CO	0.0 ppt	65/100
73	80401	Golden	CO	0.0 ppt	50/100
74	80132	Monument	CO	0.0 ppt	52/100

Methodology

PFAS detection data comes from EPA UCMR5 monitoring, state-level testing programs, and Consumer Confidence Reports. ZIP codes are ranked by maximum PFAS concentration detected. The EPA has set MCLs of 4 ppt for PFOA and PFOS individually. PFAS are persistent chemicals that do not break down in the environment.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-08-31.

Frequently Asked Questions

What are PFAS?

PFAS (per- and polyfluoroalkyl substances) are synthetic chemicals used in non-stick coatings, firefighting foam, and food packaging since the 1940s. They are called "forever chemicals" because they do not break down naturally. PFAS are linked to cancer, liver damage, thyroid disease, and immune system suppression.

How can I remove PFAS from my water?

Reverse osmosis (RO) and granular activated carbon (GAC) filters are effective at removing most PFAS from drinking water. NSF/ANSI 53 or 58 certified filters are recommended. Boiling water does NOT remove PFAS.