50 dirtiest cities

Based on a whole lot of boring data, Readers Digest rated the 50 large cities from cleanest to dirtiest. Dallas came in at # 30.

NAME	Air	Water	Toxics	Hazardous Waste	Sanitation	Total
Portland (OR)	49	50	35	32	43	44.00
San Jose	41	50	50	21	32	40.71
Buffalo	34	50	27	26	47	38.29
Columbus	24	50	31	45	NA	37.33
San Francisco	47	50	34	16	12	36.57
Denver	27	50	44	19	NA	36.17
Rochester (NY)	46	32	32	43	19	35.71
Austin	44	9	48	50	NA	34.00
Orlando	48	23	9	38	48	33.86
San Diego	13	50	46	42	14	32.57
Hartford	32	29	47	9	44	31.71
Sacramento	4	50	49	40	24	31.57
Las Vegas	12	50	40	49	7	31.43
San Antonio	42	18	42	47	8	31.00
Oklahoma City	43	1	45	41	40	30.57
Minneapolis	33	30	21	35	31	30.43
Indianapolis	23	31	33	44	27	30.29
Salt Lake City	26	50	2	14	42	30.00
Jacksonville	45	24	19	20	NA	29.50
Charlotte	28	34	22	27	28	28.71
Virginia Beach	35	17	29	33	30	28.00
Cincinnati	19	35	11	38	34	27.29
Nashville	30	14	18	46	38	27.14
Riverside (CA)	1	50	43	25	15	26.43
New Orleans	39	13	10	48	21	26.14
Milwaukee	37	10	38	38	10	25.71
Seattle	36	21	37	15	13	25.57
Baltimore	16	33	14	24	41	25.29
Miami	50	11	36	8	9	25.00
Dallas	20	28	30	31	16	24.71
Tampa	40	3	17	17	50	24.29
Memphis	22	12	24	29	46	23.86
Providence	39	8	41	7	22	23.43
Louisville	21	15	15	39	35	23.00
Washington (DC)	25	19	12	13	45	22.57
Phoenix	17	37	1	22	23	22.00
Detroit	10	27	20	10	49	21.86
Richmond	31	4	13	34	36	21.86
Cleveland	9	25	26	31	26	21.57
Atlanta	15	26	4	11	39	19.43
Houston	7	39	3	19	20	19.14
Los Angeles	2	38	28	3	17	18.29
Boston	29	7	39	5	11	18.14
Philadelphia	14	22	16	2	37	18.14
Kansas City	19	16	25	13	NA	18.00
Birmingham	8	20	8	28	33	17.86
St. Louis	5	36	6	6	25	17.00
Pittsburgh	6	5	5	23	29	11.29
New York	11	2	23	1	NA	8.33
Chicago	3	6	7	4	18	6.71

To figure out what data they used to score the cities, go here, but the main point is the lower the number, the cleaner it is.

And I was looking for a list of the Worlds worst cities, but could not find it. Instead I found a bunch of stuff bashing Mumbai, India and Shanghai China, So I guess consider those dirty as hell.